U.S. Department of the Interior

U.S. Geological Survey

Shear-Wave Velocity of the Ground Near Sixty California Strong Motion Recording

Sites by the Spectral Analysis of Surface Waves (SASW) Method

and Harmonic-Wave Sources

Robert Kayen, Eric Thompson, Diane Minasian and Brad Carkin

Coastal and Marine Geology Program

345 Middlefield Road

Menlo Park, CA 94025

OPEN-FILE REPORT 2005-1366

U.S. GEOLOGICAL SURVEY, MENLO PARK, CA 94025
Shear-Wave Velocity of the Ground Near Sixty California Strong Motion Recording

Sites by the Spectral Analysis of Surface Waves (SASW) Method

and Harmonic-Wave Sources

Robert Kayen, Eric Thompson, Diane Minasian and Brad Carkin

United States Geological Survey

Coastal and Marine Geology Program

345 Middlefield Road

Menlo Park, CA 94025

INTRODUCTION

The seismic networks for California are coordinated through the Northern California

Seismic Net (NCSN), the U.C. Berkeley Digital Seismic Net (BDSN), the southern

California Seismic Network (SCSN), and the seismological laboratory of the University

of Nevada, Reno (UNR). These networks are administered through collaborative efforts

of the U.S. Geological Survey, California Institute of Technology (SCSN), U.C. San

Diego and U.C. Berkeley, UNR, and the California Geological Survey (CSMIP). Many

hundreds of these sites have little or no quantitative characterization for site amplification

effects or natural site period of vibration. In this study, we investigate sixty strong

motion recording (SMR) sites using an active-source approach that employs ultra-low

frequency-controlled harmonic waves to measure the dispersive nature of surface waves

in the ground. An inversion algorithm employing a non-linear least-squares best fit is

used to invert shear-wave velocities for the upper 30 meters of the soil column.

The overall objective of this project is to visit unclassified California strong motion

recording (SMR) sites and acquire spectral analysis of surface waves (SASW) data to

characterize the site stiffness properties to a minimum depth of 30 meters. The principal

products of this effort are the computation of shear-wave velocity logs, Vs-30 site values,

and NEHRP site classification. This study was conducted at the request of the Pacific

Earthquake Engineering Research (PEER) Center, Lifelines Program Task 1L10 to

provide a quantitative basis for site classification of ground associated with recorded

ground motions used in the Next Generation Attenuation (NGA) modeling project. Our

preliminary findings were delivered in digital format on January 30, 2004 to PEER-NGA

project participants through a password protected FTP site. An interim report with shearwave velocity profiles was distributed to NGA members in digital form through the same

web site on March 30, 2004. This was followed by an informal review process with

several NGA participants that resulted in the computation of new shear-wave velocities

using an inversion algorithm with reduced soil model layering, and clarification on the

locations of several of the SASW test sites.

STUDY AREA

From December 13, 2003 to January 15, 2004 we investigated 60 SMR sites selected

by staff of the California Geological Survey (CGS) and California Strong Motion

Instrumentation Program (CSMIP) in northern and southern California. These sites are

locations of prior recorded ground motions for which there are no measured quantitative
site stiffness properties. Fieldwork was clustered in spatial bins to optimize our field

travel and to maximize the number of sites where data could be collected each day. Maps

of the SMR sites investigated by the SASW team are presented in Figures 1-3. Figure 1

presents the statewide data collection effort. Of these sixty sites, 12 are located in the

San Francisco Bay area and the remaining 48 are located in the Coast-Ranges, the Los

Angeles region and the southern California desert. The second figure, Figure 2, shows the

northern California test sites. Red sites were visited and tested: green sites were sites on

the NGA project list where we attempted to test but were restricted by either site access

issues or limited time (Figure 2). In southern California, we tested the majority of sites on

the NGA project list (Figure 3). Again, red sites were tested, and green sites are on the

NGA target list and were not tested.

The latitude and longitude locations of the SMR sites were given to the SASW team

by CGS in NAD27 datum coordinates. We attempted to locate our profiles as close as

practicable to each site using hand-held GPS units. In Table 1 we list the measured

locations of the SASW site, the map estimated location of the SMR site, and the distance

separating them. This table also presents the average 30 meter velocity (Vs30) and the

NEHRP site classification. In most cases, we were able to locate the SASW array within

100 meters of the CGS coordinates. In one case, site 625SSF, we located on an asphalt

parking lot constructed on fill, alluvium, and bay sediment adjacent to a rock outcrop at

Sierra Point. The seismometer station is located on the rock site and its velocity structure

bears no relation to the data collected at 625SSF. For this one case, we did not include

the data for the SASW site in this report. Other sites had inaccurate GPS locations that

we were able to correct, or note (i.e., 620AND, 633CSP; 647SAD; 649MWO; 658WDH).

FIELD METHODS

Spectral analysis of surface waves (SASW) testing is an inexpensive and efficient

means for non-invasively estimating the stiffness properties of the ground. Various active

and passive source surface wave methods have been developed to profile the subsurface

from tens-of-meters to kilometers in depth. Prior to the development of non-invasive

surface wave methods, shear-waves were measured in cased boreholes or during standard

or cone penetration tests, both relatively costly methods, using a conventional travel-time

approach. Static cone penetration tests often cannot sound to useful depths for site

response characterization as the soil stiffness mobilizes to resists the maximum static

shear the truck can deliver at shallow depths (<30m) for all but the softest sites. Surface

wave test apparatus is highly portable, allowing for measurements in extremely remote

locations, at soft sites where vehicles cannot drive, and in sub-aqueous environments

(Stokoe and Nazarian, 1985).
Figure 1. State map showing the locations of SASW test sites included in this report.

We used a surface wave testing system to collect dispersion data for sixty sites

employing a crew of 2 or 3 people. The test apparatus consists of 1-Hz Kinemetrics1

seismometers, a low frequency spectrum analyzer, a computer-controlled continuous

harmonic-wave source (shaker) and amplifier, cables and a small 4.5kW generator. The

shaker-source is centered in the SASW seismometer line and receives an oscillatorysignal from a sine function generator. The output signal from the sine wave source is

boosted by an amplifier to produce a continuous harmonic-wave that shakes the ground

with surface waves of a specific frequency. The receivers measure the waves and a fast

Fourier transform (FFT) is performed on each of the four receiver signals. The test steps

through a suite of frequencies for which phase computations, respectively are made. In
near-real time, the linear spectra, cross power spectra, and coherence are computed. The

ability to perform near real-time frequency domain calculations and monitor the progress

and quality of the test allows us to adjust various aspects of the test to optimize the

capture of the phase data while on-site in the field. These aspects include the sourcewave generation, frequency step-size between each sine-wave burst, number of cyclesper-frequency, total frequency range of all the steps, and receiver spacing. This method

of swept-sine surface wave testing will sweep through a broad range of low frequencies

in order to capture the surface wave-dispersion characteristics of the ground. This

approach is a slight modification of the Continuous Sine wave Source Spectral Analysis

of Surface Waves (CSS-SASW) test presented by Kayen and others (2004a; 2004b).

Figure 2. Southern California SASW test sites near SMR station. Red stations were tested;

green stations were visited but site access was denied.

We adopted a common source-midpoint geometry in our array set up (Figure 4). To

do this, we placed the harmonic-source at the centerline of the survey with the forward

and reverse direction sensor-pairs equidistant from the source for each given array

spacing. This configuration allowed us to merge the forward and reverse direction

dispersion curves if they were similar. In order to build a merged dispersion profile for

the site, several different receiver spacings were used to capture the high-, medium-, and

low-frequency ranges of the surface wave dispersion. Spacing of the receivers stepped

geometrically from 1 meter to 64 meters, i.e. 1, 2, 4, 8, 16, 32, and 64 meters. The two
seismometers were separated by a given distance, d, and the source was usually placed at

a distance of 2d from the inner seismometer. When the array separation increased to a

point where the d:2d spacing became impractical, either due to space limitations, cable

limits, or the attenuation, the array spacing was changed to d:d. Prior investigations have

shown that array spacing ratios between d:d and d:2d are a good compromise in

minimizing near field effects and distant-wave attenuation (Sanchez-Salinero, et al.,

1987).

Figure 3. Northern California SASW test sites near SMR stations. Red stations were tested;

green stations were visited but site access was denied.

In the field, we compute the Rayleigh wave wavelengths (λ) by relating the

seismometer spacing (δ) and the phase angle (θ, in radians determined from the crosspower spectra) between the seismometers:

λ = 2πδ/θ .............................................................................................................(1)

The Rayleigh wave surface wave velocity, Vr, is computed as the product of the

frequency and its associated wavelength:

Vr = ƒλ................................................................................................................(2)
The grouped and average dispersion curves for the SMR sites are presented in the

Appendix. We compute in the field reference velocity values for each seismometer set

up for phase angles of π, 2π, and 4π. After completion of the field data collection, we

will then compute a dispersion curve velocity profile for all calculated phase angles.

Figure 4. Configuration of the USGS surface wave testing system, composed of 1-Hz sensors

and a 100 kg electro-mechanical shakers. Array separation changes from d:2d to d:d for large

array separations when signal strength to the outermost receivers is weak.

INVERSION PROCEDURE

The inversion process is used to estimate the soil stiffness model whose computed

theoretical-dispersion curve is a best-fit with the experimental dispersion data collected

in the field. That is, we invert shear-wave velocity profiles using an inversion code that

hunts for the best-fit shear-wave velocity profile whose theoretical dispersion curve is the

closest match with the averaged field dispersion curve. The term “best-fit” refers to the

minimum sum of the squares of residuals from the differences between the theoretical

and experimental dispersion curves. The inversion algorithm, WaveEq of OYO Corp.

(Hayashi and Kayen, 2003) uses an automated-numerical approach that employs a

constrained least-squares fit of the theoretical and experimental dispersion curves. We

also ran independent inversion algorithms, inverse.m (Lai and Rix, 1998) and WinSASW

(Joh, 1998) to validate the profiles computed from WaveEQ.
The shear-wave velocity structure of the study sites is presented for the uppermost

thirty meters of the ground in the Appendix figures A1-A13 for each of the sixty SMR

sites. The inversion of a theoretical velocity profile was performed using the inversion

code WaveEQ. Typically, a ten-layer model was used for the inversion, with layer

thicknesses geometrically expanding with depth. The increased layer thicknesses with

depth correspond with decreased dispersion information in the longer wavelength portion

of the dispersion curve. The profiles generally increase in stiffness with depth, though

low velocity layers are present in several of the profiles.

RESULTS

The testing program investigated sixty sites in California. These sites are listed in

order of the SASW site number (602-661) in Table 1. Typically, these strong motion

recording (SMR) sites are located in undeveloped rural areas; fire stations; small

businesses; near Southern California Edison sub-station facilities; SBC Telephone

network stations; and public park grounds. We attempted to locate within these facilities

next to the SMR station, or tested immediately adjacent to the facility.

Table 1. SMR stations locations and their corresponding SASW and instrument site

identifier. The computed 30-meter average shear-wave velocity and site codes are presented as

VS30 and NEHRP. Positions refer to the position of the shaker sources during the SASW test.

The simplest way of characterizing the overall site condition is to use the average

shear-wave velocity in the uppermost 30 meters of the subsurface (Vs30; ICC, 2002).

Equation 3 is used to compute this average velocity based on the unit layer thickness (di)

and the corresponding interval-velocity (VSi).

€

VS30 =

di

i=1

n

∑

di

i=1 VSi

n

∑

(3)

In Table 1 and the Appendix, we report the computed Vs30 values from the 8-10 layer

models. The tested sites fall within an average velocity range of 235-to-902 m/s. The

velocities fall within NEHRP categories “B”, "C", and "D". To better classify the

stiffness of these units we have informally subdivided the categories with a + or - prefix

to indicate whether the velocity falls within the upper or lower half of the 360 m/s range

within each letter class (e.g. Class D-; D+, C-; C+ soils).

ACKNOWLEDGMENTS

This project was supported by the Pacific Earthquake Engineering Research Center

and their funders at Caltrans, the Pacific Gas and Electric Company, and the California

Energy Commission.
REFERENCES

Hayashi, K. and Kayen, R. (2003) Comparative test of three surface wave methods at

Williams Street Park in San Jose, USA. Paper S051-009, 2003 Joint Meeting of

Japan Earth and Planetary Science, University of Tokyo, Tokyo, Japan 2003

Joint Meeting, May 26-29, 2003.

International Code Council, Inc., (2002). 2003 International Building Code, Falls

Church, VA.

Joh, S.-H. (1996) Advances in Interpretation and Analysis Techniques for SpectralAnalysis-of-Surface -Wave (SASW) Measurements, Ph.D. Dissertation, Univ.

of Texas at Austin.

Kayen, R. (2005) The spectral analysis of surface waves measured at William

Street Park, San Jose, California, using swept-sine harmonic waves. In Asten

and Boore, eds., Blind comparisons of shear-wave velocities at closely-spaced

sites in San Jose, California. U.S. Geological Survey Open-File Report 2005-

1169, 6 p. [http://pubs.usgs.gov/of/2005/1169/].

Kayen, R., Seed, R. B., Moss, R.E., Cetin, O., Tanaka, Y., and Tokimatsu, K. (2004)

Global Shear-wave Velocity Database for Probabilistic Assessment of the

Initiation of Seismic-Soil Liquefaction. Proceedings of the 11th Int’l. Conf. On

Soil Dynamics and Earthquake Engineering, January 7-9, 2004, Berkeley, CA,

p. 506-512.

Kayen, R., Thompson, E., Minasian, D., Moss, R.E.S., Collins, B.D., Sitar, N., Dreger,

D., Carver, G. (2004) Geotechnical Reconnaissance of the November 3, 2002

M7.9 Denali Fault Earthquake, Earthquake Spectra, 20(3) p. 639-667.

Lai, C.G., and G. J. Rix (1998) Simultaneous Inversion of Rayleigh Phase Velocity and

Attenuation for Near-Surface Site Characterization," Report No. GITCEE/GEO-98-2, Georgia Institute of Technology, School of Civil and

Environmental Engineering, 258 pp.

Sanchez-Salinero, I., Roesset, J.M., Shao, K-Y., Stokoe, K.H., Ii, Rix, G.J. (1987)

Analytical Evaluation Of Variables Affecting Surface Wave Testing Of

Pavements, Transportation Research Record No.1136, Pp.86-95.

Stokoe, K. and Nazarian, S. (1985) Use of Raleigh Waves in liquefaction Studies, in,

R.D. Woods, ed., Measurement and use of Shear-wave Velocity for Evaluating

Dynamic Soil Properties. ASCE, N.Y., 1-17.
Appendix A.

Photographs, seismic wave velocity profiles, and data sets for sixty California strong

motion recording stations.
TABLE1. SASW sites tested for the PEER NGA Project 1L10B sorted by sequentially-numbered SASW test identifier.

USGS ID USGS -Lat USGS-Long Velocity Vs30 (m/s) Distance (m)* Station number Station name lat lon NGA category geologic unit

602RDA 33 20.908 116 24.05 D+ 329 94 5047 Rancho De Anza 33.348 116.4 primary Qal, coarse

603ATC 33 27.563 116 38.653 C- 471 48 5231 Anza - Tule Canyon 33.459 116.644 primary Kgr

604ATV 33 28.751 116 35.550 C+ 605 0 5045 Anza - Terwilliger Valley 33.48 116.59 primary Kgr

605SRM 33 34.086 116 30.706 C+ 744 164 5230 Santa Rosa Mountain 33.568 116.51 primary Kgr

606APF 33 36.376 116 27.124 C+ 577 119 5044 Anza - Pinyon Flat 33.607 116.453 primary Kgr

607MHS 33 35.919 117 07.925 C- 443 39 13198 Murrieta Hot Springs 33.599 117.132 primary J metamorphic

608WBR 33 38.408 117 05.807 C+ 619 259 13199 Winchester Bergman Ran 33.64 117.094 primary

609IKF 33 42.459 116 43.047 B- 902 57 5232 Idyllwild - Keenwild Fire Station 33.708 116.717 to add Kgr

610SPV 33 51.069 116 51.221 C+ 619 158 12206 Silent Valley - Poppet Flat 33.851 116.852 primary Kgr

611BTP 33 52.144 116 49.509 C+ 630 108 12674 Banning - Twin Pines Road 33.869 116.824 to add Kgr

612DCP 34 13.419 117 19.851 B- 773 42 23732 San Bernardino - Devil Canyon Penstock 34.224 117.331 to add Kgr

613TSH 34 09.727 117 19.971 D+ 336 127 23701 San Bernardino - 3-story Motel 34.163 117.332 to add

614DRW 34 09.939 117 15.051 C- 486 41 5331 San Bernardino - Del Rosa Wk Sta 34.166 117.251 to add Kgr

615RCU 34 10.150 117 34.742 C- 432 18 23598 Rancho Cucamonga - Deer Can 34.169 117.579 primary Kgr

616SFS 34 11.542 117 25.608 C- 376 72 5036 San Bernardino - Sycamore FS 34.193 117.427 to add

617LGP 37 10.337 122 00.682 D+ 345 132 16 LGPC 37.172 122.01 primary Tss

618GUN 37 14.352 122 06.386 C- 522 45 1697 Los Gatos - Los Altos Rod & Gun 37.239 122.106 to add Tss

619COY 37 07.453 121 33.169 C- 469 165 57504 Coyote Lake Dam (Downst) 37.124 121.551 primary Tss

620AND 37 09.930 121 37.904 C- 383 336* 1652 Anderson Dam Left Abutment 37.166 121.628 primary

621FVC 37 28.121 122 18.494 D- 240 78 1752 Woodside - Filoli Visitor Center 37.468 122.308 to add KJf

622CHP 37 33.161 122 05.478 C+ 588 38 1750 Fremont - Coyote Hills Park 37.553 122.091 to add KJf

623UCM 37 36.023 122 00.415 C- 461 91 1739 Union City - Masonic Home 37.6 122.006 to add Tss

624SOP 37 30.869 121 49.807 D+ 346 59 1684 Sunol - Ohlone Wilderness Reg Pk 37.515 121.83 to add Tss

626CLF 37 46.792 122 30.700 C- 393 241 58132 SF - Cliff House 37.778 122.513 primary KJf

627PVC 35 58.386 120 28.036 C- 390 26 36177 Parkfield - Vineyard Cany 2E 35.973 120.467 primary

628LHM 34 39.146 118 28.837 D+ 294 428 24523 Lake Hughes #4B - Camp Mend 34.65 118.477 primary pCg

629FRT 34 52.241 118 53.968 D+ 314 92 998 Fort Tejon 34.87 118.9 primary Kgr

630ANT 34 45.444 118 21.651 C- 483 68 24310 Antelope Buttes 34.758 118.361 primary Kgr

631FMD 34 42.255 118 25.662 C- 486 157 24270 (121) Fairmont Dam 34.704 118.426 primary Kgr

632MOV 35 02.509 118 22.693 D+ 320 112 34237 Mojave - Oak Creek Canyon 35.042 118.377 primary

633CSP 34 18.468 117 18.912 C- 417 1.42km* 112 Cedar Springs Pumphouse 34.31 117.3 primary Kgr

634WSW 34 22.132 117 39.642 C- 390 247 23574 Wrightwood - Swarthout 34.369 117.658 primary

635JKF 34 22.863 117 44.182 C- 466 58 23590 Wrightwood - Jackson Flat 34.381 117.737 primary schist

636SOD 34 06.638 117 05.948 C- 470 43 5300 Seven Oaks Dam Donwstream Surf. 34.111 117.099 to add Kgr

637HBP 34 09.536 116 47.919 C- 453 229 22104 Heart Bar State Park 34.161 116.799 to add Kgr

638RCO 34 00.257 117 13.424 C- 488 76 5037 Reche Canyon - Olive Dell Ranch 34.004 117.223 to add QT

639RIV 33 53.615 117 19.289 C- 494 209 13916 Riverside - Van Buren & Trautwein 33.895 117.32 to add Kgr

640LMD 33 51.222 117 27.008 C- 533 204 707 Lake Mathews Dike Toe 33.852 117.451 primary Kgr

641PER 33 47.134 117 13.784 C- 518 161 13928 Perris - San Jacinto & C Street 33.787 117.23 to add Qal, thin

642NVO 33 49.100 117 07.974 C- 369 ? 13095 Nuevo - 11th & McKinley 33.818 117.132* to add Kgr

643MVA 33 38.894 117 12.291 C- 503 79 13929 Menifee Valley - Murrieta & Scott 33.649 117.205 to add Qal, thin

644LKE 33 40.100 117 19.955 C+ 616 91 13922 Lake Elsinore - Graham & Poe 33.669 117.332 to add J metamorphic

645CCD 33 54.741 117 50.389 D- 235 171 108 Carbon Canyon Dam 33.912 117.838 primary Qal, thin

646HHC 33 59.405 117 56.624 D+ 337 69 90073 Hacienda Heights - Colima 33.99 117.943 primary Qal, thin
647SAD 34 11.044 118 01.237 C- 774 263* 104 Santa Anita Dam 34.185 118.018 primary Kgr

648CWD 34 14.686 117 57.911 C- 464 111 23210 Cogswell Dam - Right Abutment 34.245 117.964 to add Kgr

649MWO 34 13.615 118 04.004 C- 390 913* 24399 Mt Wilson - CIT Seis Sta 34.224 118.057 primary Kgr

650MBS 34 13.938 117 39.755 C- 438 163 23572 Mt Baldy - Elementary Sch 34.233 117.661 primary

651TUJ 34 17.219 118 13.610 C- 415 202 90061 Big Tujunga, Angeles Nat F 34.286 118.225 primary Kgr

652SFD 34 27.560 118 45.092 C- 389 154 24280 (285) Santa Felita Dam (Outlet) 34.46 118.753 primary Qal, coarse

653SVL 34 15.791 118 40.220 C- 391 179 24861 Simi Valley - Katherine Rd & Sylvan 34.262 118.669 to add Qal, deep

654HST 34 12.239 118 18.110 C+ 714 16 90059 Burbank - Howard Rd. 34.204 118.302 primary Qal, deep

655LAF 34 05.358 118 26.084 D- 255 43 90016 LA - N Faring Rd 34.089 118.435 primary Qoa

656RPV 33 44.724 118 23.886 C- 501 206 14404 Rancho Palos Verdes - Hawth 33.746 118.396 primary

657MFC 34 02.720 118 38.344 C- 477 106 90050 Malibu - Las Flores Canyon 34.045 118.638 primary J metamorphic

658WDH 34 10.009 118 35.833 D- 265 113* 24807 Woodland Hills - Canoga & Ventura 34.167 118.596 to add Qal, thin, west

659CAM 34 13.431 118 59.688 D- 321 73 24863 Camarillo - Woodcreek & Santa Rosa 34.224 118.994 to add Qal, thin

660SLO 35 17.079 120 39.641 C- 481 51 1083 San Luis Obispo 35.285 120.661 primary KJf

661JBO 36 51.698 121 34.696 C- 372 46 47315 JB Overpass, Bent 3 g.l. 36.862 121.578 primary

*NOTES

"Distance" is the distance between the USGS and NGA waypoints

Station Numbers in parens were changed by Vladimir Graizer

Station # 13095 - we believe the Longitude to be 117.132, not 117.312

A few examples of NGA waypoint problems:

620AND - The waypoint is in the reservoir

633CSP - The waypoint is in a cow pasture

647SAD - The actual seismometer is at the dam station, not on the slope below

649MWO - The waypoint is on the slopes of the mountain, not at the Mt. Wilson CIT station

658WDH - The waypoint is down the street from the fire station instrument
 SASW sites tested for the PEER NGA Project 1L10B sorted by USGS/CSMIP identifier.

USGS ID USGS -Lat USGS-Long Velocity Vs30 (m/s) Distance (m)* Station # Station name lat lon NGA category geologic unit

617LGP 37 10.337 122 00.682 D+ 345 132 16 LGPC 37.172 122.01 primary Tss

647SAD 34 11.044 118 01.237 C- 774 263* 104 Santa Anita Dam 34.185 118.018 primary Kgr

645CCD 33 54.741 117 50.389 D- 235 171 108 Carbon Canyon Dam 33.912 117.838 primary Qal, thin

633CSP 34 18.468 117 18.912 C- 417 1.42km* 112 Cedar Springs Pumphouse 34.31 117.3 primary Kgr

640LMD 33 51.222 117 27.008 C- 533 204 707 Lake Mathews Dike Toe 33.852 117.451 primary Kgr

629FRT 34 52.241 118 53.968 D+ 314 92 998 Fort Tejon 34.87 118.9 primary Kgr

660SLO 35 17.079 120 39.641 C- 481 51 1083 San Luis Obispo 35.285 120.661 primary KJf

620AND 37 09.930 121 37.904 C- 383 336* 1652 Anderson Dam Left Abutment 37.166 121.628 primary

624SOP 37 30.869 121 49.807 D+ 346 59 1684 Sunol - Ohlone Wilderness Reg Pk 37.515 121.83 to add Tss

618GUN 37 14.352 122 06.386 C- 522 45 1697 Los Gatos - Los Altos Rod & Gun 37.239 122.106 to add Tss

623UCM 37 36.023 122 00.415 C- 461 91 1739 Union City - Masonic Home 37.6 122.006 to add Tss

622CHP 37 33.161 122 05.478 C+ 588 38 1750 Fremont - Coyote Hills Park 37.553 122.091 to add KJf

621FVC 37 28.121 122 18.494 D- 240 78 1752 Woodside - Filoli Visitor Center 37.468 122.308 to add KJf

616SFS 34 11.542 117 25.608 C- 376 72 5036 San Bernardino - Sycamore FS 34.193 117.427 to add

638RCO 34 00.257 117 13.424 C- 488 76 5037 Reche Canyon - Olive Dell Ranch 34.004 117.223 to add QT

606APF 33 36.376 116 27.124 C+ 577 119 5044 Anza - Pinyon Flat 33.607 116.453 primary Kgr

604ATV 33 28.751 116 35.550 C+ 605 0 5045 Anza - Terwilliger Valley 33.48 116.59 primary Kgr

602RDA 33 20.908 116 24.05 D+ 329 94 5047 Rancho De Anza 33.348 116.4 primary Qal, coarse

605SRM 33 34.086 116 30.706 C+ 744 164 5230 Santa Rosa Mountain 33.568 116.51 primary Kgr

603ATC 33 27.563 116 38.653 C- 471 48 5231 Anza - Tule Canyon 33.459 116.644 primary Kgr

609IKF 33 42.459 116 43.047 B- 902 57 5232 Idyllwild - Keenwild Fire Station 33.708 116.717 to add Kgr

636SOD 34 06.638 117 05.948 C- 470 43 5300 Seven Oaks Dam Donwstream Surf. 34.111 117.099 to add Kgr

614DRW 34 09.939 117 15.051 C- 486 41 5331 San Bernardino - Del Rosa Wk Sta 34.166 117.251 to add Kgr

610SPV 33 51.069 116 51.221 C+ 619 158 12206 Silent Valley - Poppet Flat 33.851 116.852 primary Kgr

611BTP 33 52.144 116 49.509 C+ 630 108 12674 Banning - Twin Pines Road 33.869 116.824 to add Kgr

642NVO 33 49.100 117 07.974 C- 369 ? 13095 Nuevo - 11th & McKinley 33.818 117.132* to add Kgr

607MHS 33 35.919 117 07.925 C- 443 39 13198 Murrieta Hot Springs 33.599 117.132 primary J metamorphic

608WBR 33 38.408 117 05.807 C+ 619 259 13199 Winchester Bergman Ran 33.64 117.094 primary

639RIV 33 53.615 117 19.289 C- 494 209 13916 Riverside - Van Buren & Trautwein 33.895 117.32 to add Kgr

644LKE 33 40.100 117 19.955 C+ 616 91 13922 Lake Elsinore - Graham & Poe 33.669 117.332 to add J metamorphic

641PER 33 47.134 117 13.784 C- 518 161 13928 Perris - San Jacinto & C Street 33.787 117.23 to add Qal, thin

643MVA 33 38.894 117 12.291 C- 503 79 13929 Menifee Valley - Murrieta & Scott 33.649 117.205 to add Qal, thin

656RPV 33 44.724 118 23.886 C- 501 206 14404 Rancho Palos Verdes - Hawth 33.746 118.396 primary

637HBP 34 09.536 116 47.919 C- 453 229 22104 Heart Bar State Park 34.161 116.799 to add Kgr

648CWD 34 14.686 117 57.911 C- 464 111 23210 Cogswell Dam - Right Abutment 34.245 117.964 to add Kgr

650MBS 34 13.938 117 39.755 C- 438 163 23572 Mt Baldy - Elementary Sch 34.233 117.661 primary

634WSW 34 22.132 117 39.642 C- 390 247 23574 Wrightwood - Swarthout 34.369 117.658 primary

635JKF 34 22.863 117 44.182 C- 466 58 23590 Wrightwood - Jackson Flat 34.381 117.737 primary schist

615RCU 34 10.150 117 34.742 C- 432 18 23598 Rancho Cucamonga - Deer Can 34.169 117.579 primary Kgr

613TSH 34 09.727 117 19.971 D+ 336 127 23701 San Bernardino - 3-story Motel 34.163 117.332 to add

612DCP 34 13.419 117 19.851 B- 773 42 23732 San Bernardino - Devil Canyon Penstock 34.224 117.331 to add Kgr

630ANT 34 45.444 118 21.651 C- 483 68 24310 Antelope Buttes 34.758 118.361 primary Kgr

649MWO 34 13.615 118 04.004 C- 390 913* 24399 Mt Wilson - CIT Seis Sta 34.224 118.057 primary Kgr

628LHM 34 39.146 118 28.837 D+ 294 428 24523 Lake Hughes #4B - Camp Mend 34.65 118.477 primary pCg

658WDH 34 10.009 118 35.833 D- 265 113* 24807 Woodland Hills - Canoga & Ventura 34.167 118.596 to add Qal, thin, west
653SVL 34 15.791 118 40.220 C- 391 179 24861 Simi Valley - Katherine Rd & Sylvan 34.262 118.669 to add Qal, deep

659CAM 34 13.431 118 59.688 D- 321 73 24863 Camarillo - Woodcreek & Santa Rosa 34.224 118.994 to add Qal, thin

632MOV 35 02.509 118 22.693 D+ 320 112 34237 Mojave - Oak Creek Canyon 35.042 118.377 primary

627PVC 35 58.386 120 28.036 C- 390 26 36177 Parkfield - Vineyard Cany 2E 35.973 120.467 primary

661JBO 36 51.698 121 34.696 C- 372 46 47315 JB Overpass, Bent 3 g.l. 36.862 121.578 primary

619COY 37 07.453 121 33.169 C- 469 165 57504 Coyote Lake Dam (Downst) 37.124 121.551 primary Tss

626CLF 37 46.792 122 30.700 C- 393 241 58132 SF - Cliff House 37.778 122.513 primary KJf

655LAF 34 05.358 118 26.084 D- 255 43 90016 LA - N Faring Rd 34.089 118.435 primary Qoa

657MFC 34 02.720 118 38.344 C- 477 106 90050 Malibu - Las Flores Canyon 34.045 118.638 primary J metamorphic

654HST 34 12.239 118 18.110 C+ 714 16 90059 Burbank - Howard Rd. 34.204 118.302 primary Qal, deep

651TUJ 34 17.219 118 13.610 C- 415 202 90061 Big Tujunga, Angeles Nat F 34.286 118.225 primary Kgr

646HHC 33 59.405 117 56.624 D+ 337 69 90073 Hacienda Heights - Colima 33.99 117.943 primary Qal, thin

631FMD 34 42.255 118 25.662 C- 486 157 24270 (121) Fairmont Dam 34.704 118.426 primary Kgr

631FMD 34 42.255 118 25.662 C- 486 157 24270 (121) Fairmont Dam 34.704 118.426 primary Kgr

652SFD 34 27.560 118 45.092 C- 389 154 24280 (285) Santa Felita Dam (Outlet) 34.46 118.753 primary Qal, coarse

652SFD 34 27.560 118 45.092 C- 380 154 24280 (285) Santa Felita Dam (Outlet) 34.46 118.753 primary Qal, coarse

NGA-PEER Site Classification

Site ID 602RDA

NEHRP CLASS: D

Vs30 329 (m/s)

SUB-CLASS D+

Location Rancho De Anza

NGA Site ID 5047

State CALIFORNIA 

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 33 20.908

GPS LONG (WEST 116 24.050

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 12/13/2003

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A2.—SASW site classification and location information for site 602RDA. The layered inversion model of shear wave velocity in the upper 30 meters is presented in 

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720

Vs (m/s)

z (m)

602RDA

Vs30

0

50

100

150

200

250

300

350

400

0 10 20 30 40

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 603ATC

NEHRP CLASS: C

Vs30 471 (m/s)

SUB-CLASS CLocation Anza - Tule Canyon

NGA Site ID 5231

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 33 27.563

GPS LONG (WEST 116 38.653

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 12/14/2003

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A4.—SASW site classification and location information for site 603ATC. The layered inversion model of shear wave velocity in the upper 30 meters is presented in 

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720

Vs (m/s)

z (m)

603ATC

Vs30

0

100

200

300

400

500

600

0 50 100 150

Frequency (Hz)

Phase Velocity (m/s)

Inverted Phase Velocity (m/s)

Field Ave. Velocity (m/s)

NGA-PEER Site Classification

Site ID 604ATV

NEHRP CLASS: C

Vs30 605 (m/s)

SUB-CLASS C+

Location Anza - Terwilliger Valley

NGA Site ID 5045

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 33 28.751

GPS LONG (WEST 116 35.550

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 12/14/2003

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A6.—SASW site classification and location information for site 604ATV. The layered inversion model of shear wave velocity in the upper 30 meters is presented in 

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080

Vs (m/s)

z (m)

604ATV

Vs30

0

100

200

300

400

500

600

700

800

0 20 40 60 80

Frequency (Hz)

Phase Velocity (m/s)

Inverted Phase Velocity (m/s)

Field Ave. Velocity (m/s)

NGA-PEER Site Classification

Site ID 605SRM

NEHRP CLASS: C

Vs30 744 (m/s)

SUB-CLASS BLocation SANTA ROSA MOUNTAIN

NGA Site ID 5230

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 33 34.086

GPS LONG (WEST 116 30.706

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 12/13/2003

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A8.—SASW site classification and location information for site 605SRM. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080 1440

Vs (m/s)

z (m)

605SRM

Vs30

0

200

400

600

800

1000

1200

0 20 40 60

Frequency (Hz)

Phase Velocity (m/s)

Inverted Phase Velocity (m/s)

Field Ave. Velocity (m/s)

NGA-PEER Site Classification

Site ID 606APF

NEHRP CLASS: C

Vs30 577 (m/s)

SUB-CLASS C+

Location Anza - Pinyon Flat

NGA Site ID 5044

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 33 36.376

GPS LONG (WEST 116 27.124

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 12/14/2003

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A10.—SASW site classification and location information for site 606APF. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080

Vs (m/s)

z (m)

606APF

Vs30

0

100

200

300

400

500

600

700

800

0 20 40 60 80 100 120

Frequency (Hz)

Phase Velocity (m/s)

Inverted Phase Velocity (m/s)

Field Ave. Velocity (m/s)

NGA-PEER Site Classification

Site ID 607MHS

NEHRP CLASS: C

Vs30 443 (m/s)

SUB-CLASS CLocation Murrieta Hot Springs

NGA Site ID 13198

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 33 35.919

GPS LONG (WEST 117 07.925

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 12/15/2003

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A12.—SASW site classification and location information for site 607MHS. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080

Vs (m/s)

z (m)

607MHS

Vs30

0

100

200

300

400

500

600

0 20 40 60 80 100

Frequency (Hz)

Phase Velocity (m/s)

Inverted Phase Velocity (m/s)

Field Ave. Velocity (m/s)

NGA-PEER Site Classification

Site ID 608WBR

NEHRP CLASS: C

Vs30 619 (m/s)

SUB-CLASS C+

Location Winchester Bergman Ranch

NGA Site ID 13199

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 33 38.408

GPS LONG (WEST 117 05.807

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 12/15/2003

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A14.—SASW site classification and location information for site 608WBR. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080 1440 1800

Vs (m/s)

z (m)

608WBR

Vs30

0

200

400

600

800

1000

1200

1400

0 10 20 30 40 50

Frequency (Hz)

Phase Velocity (m/s)

Inverted Phase Velocity (m/s)

Field Ave. Velocity (m/s)

NGA-PEER Site Classification

Site ID 609IKF

NEHRP CLASS: B

Vs30 902 (m/s)

SUB-CLASS BLocation Idyllwild - Keenwild Fire Sta.

NGA Site ID 5232

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 33 42.459

GPS LONG (WEST 116 43.047

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 12/16/2003

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A16.—SASW site classification and location information for site 609IKF. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080 1440

Vs (m/s)

z (m)

609IKF

Vs30

0

200

400

600

800

1000

1200

0 50 100 150

Frequency (Hz)

Phase Velocity (m/s)

Inverted Phase Velocity (m/s)

Field Ave. Velocity (m/s)

NGA-PEER Site Classification

Site ID 610SPV

NEHRP CLASS: C

Vs30 619 (m/s)

SUB-CLASS C+

Location Silent Valley - Poppet Flat

NGA Site ID 12206

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 33 51.069

GPS LONG (WEST 116 51.221

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 12/16/2003

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A18.—SASW site classification and location information for site 610SPV. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080 1440

Vs (m/s)

z (m)

610SPV

Vs30

0

100

200

300

400

500

600

700

800

0 20 40 60 80 100

Frequency (Hz)

Phase Velocity (m/s)

Inverted Phase Velocity (m/s)

Field Ave. Velocity (m/s)

NGA-PEER Site Classification

Site ID 611BTP

NEHRP CLASS: C

Vs30 630 (m/s)

SUB-CLASS C+

Location Banning - Twin Pines Road

NGA Site ID 12674

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 33 52.144

GPS LONG (WEST 116 49.509

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 12/16/2003

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A20.—SASW site classification and location information for site 611BTP. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080

Vs (m/s)

z (m)

611BTP

Vs30

0

100

200

300

400

500

600

700

800

900

0 20 40 60 80

Frequency (Hz)

Phase Velocity (m/s)

Inverted Phase Velocity (m/s)

Field Ave. Velocity (m/s)

NGA-PEER Site Classification

Site ID 612DCP

NEHRP CLASS: B/C

Vs30 773 (m/s)

SUB-CLASS BLocation San Bern. - Devil Cyn Peak

NGA Site ID 23732

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 34 13.419

GPS LONG (WEST 117 19.851

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 12/17/2003

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A22.—SASW site classification and location information for site 612DCP. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080 1440

Vs (m/s)

z (m)

612DCP

Vs30

0

100

200

300

400

500

600

700

800

900

0 20 40 60 80 100

Frequency (Hz)

Phase Velocity (m/s)

Inverted Phase Velocity (m/s)

Field Ave. Velocity (m/s)

NGA-PEER Site Classification

Site ID 613TSH

NEHRP CLASS: D

Vs30 336 (m/s)

SUB-CLASS D+

Location San Bern. - 3-Story Motel

NGA Site ID 23701

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 34 09.727

GPS LONG (WEST 117 19.971

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 12/17/2003

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A24.—SASW site classification and location information for site 613TSH. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720

Vs (m/s)

z (m)

613TSH

Vs30

0

50

100

150

200

250

300

350

400

450

0 20 40 60 80 100

Frequency (Hz)

Phase Velocity (m/s)

Inverted Phase Velocity (m/s)

Field Ave. Velocity (m/s)

NGA-PEER Site Classification

Site ID 614DRW

NEHRP CLASS: C

Vs30 486 (m/s)

SUB-CLASS CLocation San Bern. -Del Rosa Wk Sta.

NGA Site ID 5331

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 34 09.939

GPS LONG (WEST 117 15.051

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 12/17/2003

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A26.—SASW site classification and location information for site 614DRW. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080

Vs (m/s)

z (m)

614DRW

Vs30

0

100

200

300

400

500

600

700

0 20 40 60 80 100

Frequency (Hz)

Phase Velocity (m/s)

Inverted Phase Velocity (m/s)

Field Ave. Velocity (m/s)

NGA-PEER Site Classification

Site ID 615RCU

NEHRP CLASS: C

Vs30 432 (m/s)

SUB-CLASS CLocation R. Cucamonga - Deer Cyn.

NGA Site ID 23598

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 34 10.150

GPS LONG (WEST 117 34.742

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 12/18/2003

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A28.—SASW site classification and location information for site 615RCU. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720

Vs (m/s)

z (m)

615RCU

Vs30

0

100

200

300

400

500

600

700

0 20 40 60

Frequency (Hz)

Phase Velocity (m/s)

Inverted Phase Velocity (m/s)

Field Ave. Velocity (m/s)

NGA-PEER Site Classification

Site ID 616SFS

NEHRP CLASS: C/D

Vs30 376 (m/s)

SUB-CLASS CLocation San Bern. - Sycamore FS

NGA Site ID 5036

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 34 11.542

GPS LONG (WEST 117 25.608

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 12/18/2003

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A30.—SASW site classification and location information for site 616SFS. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720

Vs (m/s)

z (m)

616SFS

Vs30

0

100

200

300

400

500

600

0 50 100 150

Frequency (Hz)

Phase Velocity (m/s)

Inverted Phase Velocity (m/s)

Field Ave. Velocity (m/s)

NGA-PEER Site Classification

Site ID 617LGP

NEHRP CLASS: C/D

Vs30 345 (m/s)

SUB-CLASS D+

Location Los Gatos - LGPC

NGA Site ID 16

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 37 10.337

GPS LONG (WEST 122 00.682

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 12/27/2003

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A32.—SASW site classification and location information for site 617LGP. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720

Vs (m/s)

z (m)

617LGP

Vs30

0

50

100

150

200

250

300

350

400

450

0 50 100 150

Frequency (Hz)

Phase Velocity (m/s)

Inverted Phase Velocity (m/s)

Field Ave. Velocity (m/s)

NGA-PEER Site Classification

Site ID 618GUN

NEHRP CLASS: C

Vs30 522 (m/s)

SUB-CLASS CLocation Los Gatos - L.Altos Rod+Gun

NGA Site ID 1697

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 37 14.352

GPS LONG (WEST 122 06.386

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 12/27/2003

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A34.—SASW site classification and location information for site 618GUN. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080

Vs (m/s)

z (m)

618GUN

Vs30

0

100

200

300

400

500

600

700

0 20 40 60 80 100

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 619COY

NEHRP CLASS: C

Vs30 469 (m/s)

SUB-CLASS CLocation Coyote Lake Dam

NGA Site ID 57504

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 37 07.453

GPS LONG (WEST 121 33.169

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 12/28/2003

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A36.—SASW site classification and location information for site 619COY. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720

Vs (m/s)

z (m)

619COY

Vs30

0

100

200

300

400

500

600

700

0 10 20 30 40

Frequency (Hz)

Phase Velocity (m/s)

Inverted Phase Velocity (m/s)

Field Ave. Velocity (m/s)

NGA-PEER Site Classification

Site ID 620AND

NEHRP CLASS: C

Vs30 383 (m/s)

SUB-CLASS CLocation Anderson Dam (base)

NGA Site ID 1652

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 37 09.930

GPS LONG (WEST 121 37.904

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 12/28/2003

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A38.—SASW site classification and location information for site 620AND. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720

Vs (m/s)

z (m)

620AND

Vs30

0

100

200

300

400

500

600

0 20 40 60 80 100

Frequency (Hz)

Phase Velocity (m/s)

Inverted Phase Velocity (m/s)

Field Ave. Velocity (m/s)

NGA-PEER Site Classification

Site ID 621FVC

NEHRP CLASS: D

Vs30 240 (m/s)

SUB-CLASS DLocation Woodside -Filoli Visitor Ctr

NGA Site ID 1752

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 37 28.121

GPS LONG (WEST 122 18.494

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 12/29/2003

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A40.—SASW site classification and location information for site 621FVC. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360

Vs (m/s)

z (m)

621FVC

Vs30

0

50

100

150

200

250

300

0 20 40 60 80 100

Frequency (Hz)

Phase Velocity (m/s)

Inverted Phase Velocity (m/s)

Field Ave. Velocity (m/s)

NGA-PEER Site Classification

Site ID 622CHP

NEHRP CLASS: C

Vs30 588 (m/s)

SUB-CLASS CLocation Fremont - Coyote Hills Park

NGA Site ID 1750

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 37 33.161

GPS LONG (WEST 122 05.478

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 12/30/2003

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A42.—SASW site classification and location information for site 622CHP. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080 1440 1800

Vs (m/s)

z (m)

622CHP

Vs30

0

100

200

300

400

500

600

700

800

900

0 20 40 60 80

Frequency (Hz)

Phase Velocity (m/s)

Inverted Phase Velocity (m/s)

Field Ave. Velocity (m/s)

NGA-PEER Site Classification

Site ID 623UCM

NEHRP CLASS: C

Vs30 461 (m/s)

SUB-CLASS CLocation Union City - Masonic Home

NGA Site ID 1739

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 37 36.023

GPS LONG (WEST 122 00.415

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 12/30/2003

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A44.—SASW site classification and location information for site 623UCM. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080

Vs (m/s)

z (m)

623UCM

Vs30

0

100

200

300

400

500

600

700

0 20 40 60 80

Frequency (Hz)

Phase Velocity (m/s)

Inverted Phase Velocity (m/s)

Field Ave. Velocity (m/s)

NGA-PEER Site Classification

Site ID 624SOP

NEHRP CLASS: D

Vs30 346 (m/s)

SUB-CLASS D+

Location Sunol-Ohlone Wild. Reg. Pk

NGA Site ID 1684

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 37 30.869

GPS LONG (WEST 121 49.807

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 12/30/2003

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A46.—SASW site classification and location information for site 624SOP. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080

Vs (m/s)

z (m)

624SOP

Vs30

0

100

200

300

400

500

600

0 20 40 60 80 100

Frequency (Hz)

Phase Velocity (m/s)

Inverted Phase Velocity (m/s)

Field Ave. Velocity (m/s)

NGA-PEER Site Classification

Site ID 626CLF

NEHRP CLASS: D

Vs30 393 (m/s)

SUB-CLASS CLocation San Francisco - Cliff House

NGA Site ID 58132

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 37 46.792

GPS LONG (WEST 122 30.700

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/2/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A48—SASW site classification and location information for site 626CLF. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080

Vs (m/s)

z (m)

626CLF

Vs30

0

100

200

300

400

500

600

0 50 100 150

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 627PVC

NEHRP CLASS: C

Vs30 390 (m/s)

SUB-CLASS CLocation Parkfield - Vineyard Cyn. Rd

NGA Site ID 36177

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 35 58.386

GPS LONG (WEST 120 28.036

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/5/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A50—SASW site classification and location information for site 627PVC. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720

Vs (m/s)

z (m)

627PVC

Vs30

0

100

200

300

400

500

600

0 20 40 60 80

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 628LHM

NEHRP CLASS: D

Vs30 294 (m/s)

SUB-CLASS D+

Location Lk Hughes-Camp Mendenhall

NGA Site ID 24523

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 34 39.146

GPS LONG (WEST 118 28.837

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/6/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A52—SASW site classification and location information for site 628LHM. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080

Vs (m/s)

z (m)

628LHM

Vs30

0

50

100

150

200

250

300

350

0 10 20 30 40 50

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 629FRT

NEHRP CLASS: D

Vs30 314 (m/s)

SUB-CLASS D+

Location Fort Tejon

NGA Site ID 998

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 34 52.241

GPS LONG (WEST 118 53.968

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/6/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A54—SASW site classification and location information for site 629FRT. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080

Vs (m/s)

z (m)

629FRT

Vs30

0

50

100

150

200

250

300

350

400

450

0 20 40 60 80 100

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 630ANT

NEHRP CLASS: C

Vs30 483 (m/s)

SUB-CLASS CLocation Antelope Buttes

NGA Site ID 24310

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 34 45.444

GPS LONG (WEST 118 21.651

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/6/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A56.—SASW site classification and location information for site 630ANT. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080

Vs (m/s)

z (m)

630ANT

Vs30

0

100

200

300

400

500

600

700

800

0 20 40 60 80

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 631FMD

NEHRP CLASS: C

Vs30 486 (m/s)

SUB-CLASS CLocation Fairmont Dam

NGA Site ID 24270

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 34 42.255

GPS LONG (WEST 118 25.662

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/6/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A58.—SASW site classification and location information for site 631FMD. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080

Vs (m/s)

z (m)

631FMD

Vs30

0

100

200

300

400

500

600

700

0 20 40 60 80 100

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 632MOV

NEHRP CLASS: D

Vs30 320 (m/s)

SUB-CLASS D+

Location Mojave - Oak Creek Cyn

NGA Site ID 34237

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 35 02.509

GPS LONG (WEST 118 22.693

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/7/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A60.—SASW site classification and location information for site 632MOV. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720

Vs (m/s)

z (m)

632MOV

Vs30

0

50

100

150

200

250

300

350

400

0 20 40 60 80 100

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 633CSP

NEHRP CLASS: C

Vs30 417 (m/s)

SUB-CLASS CLocation Cedar Springs Pumphouse

NGA Site ID 112

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 34 18.468

GPS LONG (WEST 117 18.912

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/7/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A62.—SASW site classification and location information for site 633CSP. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080

Vs (m/s)

z (m)

633CSP

Vs30

0

100

200

300

400

500

600

0 20 40 60 80 100

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 634WSW

NEHRP CLASS: C

Vs30 390 (m/s)

SUB-CLASS CLocation Wrightwood - Swarthout

NGA Site ID 23574

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 34 22.132

GPS LONG (WEST 117 39.642

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/8/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A64.—SASW site classification and location information for site 634WSW. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720

Vs (m/s)

z (m)

634WSW

Vs30

0

50

100

150

200

250

300

350

400

450

500

0 20 40 60 80 100

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 635JKF

NEHRP CLASS: C

Vs30 466 (m/s)

SUB-CLASS CLocation Wrightwood - Jackson Flat

NGA Site ID 23590

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 34 22.863

GPS LONG (WEST 117 44.182

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/8/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A66.—SASW site classification and location information for site 635JKF. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720

Vs (m/s)

z (m)

635JKF

Vs30

0

100

200

300

400

500

600

700

0 20 40 60 80

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 636SOD

NEHRP CLASS: C

Vs30 470 (m/s)

SUB-CLASS CLocation Seven Oaks Dam

NGA Site ID 5300

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 34 06.638

GPS LONG (WEST 117 05.948

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/8/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A68.—SASW site classification and location information for site 636SOD. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080

Vs (m/s)

z (m)

636SOD

Vs30

0

100

200

300

400

500

600

700

800

0 20 40 60 80 100

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 637HBP

NEHRP CLASS: C

Vs30 453 (m/s)

SUB-CLASS CLocation Heart Bar State Park

NGA Site ID 22104

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 34 09.536

GPS LONG (WEST 117 47.919

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/8/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A70.—SASW site classification and location information for site 637HBP. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080

Vs (m/s)

z (m)

637HBP

Vs30

0

100

200

300

400

500

600

700

800

0 20 40 60 80 100

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 638RCO

NEHRP CLASS: C

Vs30 488 (m/s)

SUB-CLASS CLocation Reche Cyn - Olive Dell Ranch

NGA Site ID 5037

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 34 00.257

GPS LONG (WEST 117 13.424

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/9/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A72.—SASW site classification and location information for site 638RCO. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080

Vs (m/s)

z (m)

638RCO

Vs30

0

100

200

300

400

500

600

700

800

0 10 20 30 40

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 639RIV

NEHRP CLASS: C

Vs30 494 (m/s)

SUB-CLASS CLocation Riverside

NGA Site ID 13916

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 33 53.615

GPS LONG (WEST 117 19.289

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/9/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A74.—SASW site classification and location information for site 639RIV. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080

Vs (m/s)

z (m)

639RIV

Vs30

0

100

200

300

400

500

600

700

800

900

1000

0 20 40 60 80 100

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 640LMD

NEHRP CLASS: C

Vs30 533 (m/s)

SUB-CLASS C+

Location Lake Mathews Dike Toe

NGA Site ID 707

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 33 51.222

GPS LONG (WEST 117 27.008

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/9/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A76.—SASW site classification and location information for site 640LMD. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080

Vs (m/s)

z (m)

640LMD

Vs30

0

100

200

300

400

500

600

700

800

900

0 20 40 60 80

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 641PER

NEHRP CLASS: C

Vs30 518 (m/s)

SUB-CLASS CLocation Perris - San Jacinto & C St.

NGA Site ID 13928

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 33 47.134

GPS LONG (WEST 117 13.784

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/9/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A78.—SASW site classification and location information for site 641PER. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080 1440

Vs (m/s)

z (m)

641PER

Vs30

0

100

200

300

400

500

600

700

0 20 40 60 80 100

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 642NVO

NEHRP CLASS: C

Vs30 369 (m/s)

SUB-CLASS CLocation Nuevo - 11th & McKinley

NGA Site ID 13095

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 33 49.100

GPS LONG (WEST 117 07.974

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/9/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A80.—SASW site classification and location information for site 642NVO. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080

Vs (m/s)

z (m)

642NVO

Vs30

0

50

100

150

200

250

300

350

400

450

500

0 20 40 60 80 100

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 643MVA

NEHRP CLASS: C

Vs30 503 (m/s)

SUB-CLASS CLocation Menifee Valley

NGA Site ID 13929

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 33 38.894

GPS LONG (WEST 117 12.291

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/10/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A82.—SASW site classification and location information for site 643MVA. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080

Vs (m/s)

z (m)

643MVA

Vs30

0

200

400

600

800

1000

1200

0 20 40 60 80 100

Frequency (Hz)

Phase Velocity (m/s)

Inverted Phase Velocity (m/s)

Field Ave. Velocity (m/s)

NGA-PEER Site Classification

Site ID 644LKE

NEHRP CLASS: C

Vs30 616 (m/s)

SUB-CLASS C+

Location Lake Elsinore

NGA Site ID 13922

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 33 40.100

GPS LONG (WEST 117 19.955

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/10/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A84.—SASW site classification and location information for site 644LKE. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080 1440

Vs (m/s)

z (m)

644LKE

Vs30

0

100

200

300

400

500

600

700

800

900

0 20 40 60 80

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 645CCD

NEHRP CLASS: D

Vs30 235 (m/s)

SUB-CLASS DLocation Carbon Canyon Dam

NGA Site ID 108

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 33 54.741

GPS LONG (WEST 117 50.389

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/10/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A86.—SASW site classification and location information for site 645CCD. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080

Vs (m/s)

z (m)

645CCD

Vs30 0

50

100

150

200

250

300

350

0 20 40 60 80 100

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 646HHC

NEHRP CLASS: D

Vs30 337 (m/s)

SUB-CLASS D+

Location Hacienda Heights - Colima

NGA Site ID 90073

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 33 59.405

GPS LONG (WEST 117 56.624

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/10/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A88.—SASW site classification and location information for site 646HHC. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720

Vs (m/s)

z (m)

646HHC

Vs30

0

50

100

150

200

250

300

350

0 50 100 150

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 647SAD

NEHRP CLASS: C

Vs30 740 (m/s)

SUB-CLASS BLocation Santa Anita Dam

NGA Site ID 104

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 34 11.044

GPS LONG (WEST 118 01.237

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/11/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A90.—SASW site classification and location information for site 647SAD. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080

Vs (m/s)

z (m)

647SAD

Vs30 0

200

400

600

800

1000

1200

0 20 40 60 80 100

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 648CWD

NEHRP CLASS: C

Vs30 464 (m/s)

SUB-CLASS CLocation Cogswell Dam

NGA Site ID 23210

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 34 14.686

GPS LONG (WEST 117 57.911

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/11/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A92.—SASW site classification and location information for site 648CWD. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720

Vs (m/s)

z (m)

648CWD

Vs30

0

100

200

300

400

500

600

700

0 20 40 60 80 100

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 649MWO

NEHRP CLASS: C

Vs30 390 (m/s)

SUB-CLASS CLocation Mount Wilson - CIT Seis Sta.

NGA Site ID 24399

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 34 13.615

GPS LONG (WEST 118 04.004

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/11/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A94.—SASW site classification and location information for site 649MWO. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720

Vs (m/s)

z (m)

649MWO

Vs30

0

100

200

300

400

500

600

700

0 20 40 60 80

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 650MBS

NEHRP CLASS: C

Vs30 438 (m/s)

SUB-CLASS CLocation Mt. Baldy - Elementary Sch.

NGA Site ID 23572

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 34 13.938

GPS LONG (WEST 117 39.755

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/12/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A96.—SASW site classification and location information for site 650MBS. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720

Vs (m/s)

z (m)

650MBS

Vs30

0

100

200

300

400

500

600

0 20 40 60

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 651TUJ

NEHRP CLASS: C

Vs30 415 (m/s)

SUB-CLASS CLocation Big Tujunga, Angeles Nat. F.

NGA Site ID 90061

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 34 17.219

GPS LONG (WEST 118 13.610

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/12/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A98.—SASW site classification and location information for site 651TUJ. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080

Vs (m/s)

z (m)

651TUJ

Vs30

0

100

200

300

400

500

600

700

0 20 40 60

Frequency (Hz)

Phase Velocity (m/s)

Inverted Phase Velocity (m/s)

Field Ave. Velocity (m/s)

NGA-PEER Site Classification

Site ID 652SFD

NEHRP CLASS: C

Vs30 389 (m/s)

SUB-CLASS CLocation Santa Felicia Dam (Outlet)

NGA Site ID 24280

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 34 27.560

GPS LONG (WEST 118 45.092

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/12/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A100.—SASW site classification and location information for site 652SFD. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720

Vs (m/s)

z (m)

652SFD

Vs30

0

50

100

150

200

250

300

350

400

450

500

0 20 40 60

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 653SVL

NEHRP CLASS: C

Vs30 391 (m/s)

SUB-CLASS CLocation Simi Valley

NGA Site ID 24861

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 34 15.791

GPS LONG (WEST 118 40.220

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/13/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A102.—SASW site classification and location information for site 653SVL. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720

Vs (m/s)

z (m)

653SVL

Vs30

0

50

100

150

200

250

300

350

400

450

500

0 20 40 60 80

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 654HST

NEHRP CLASS: B

Vs30 714 (m/s)

SUB-CLASS C+

Location Burbank - Harvard St.

NGA Site ID 90059

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 34 12.239

GPS LONG (WEST 118 18.110

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/13/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A104.—SASW site classification and location information for site 654HST. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

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15

20

25

30

0 360 720 1080 1440

Vs (m/s)

z (m)

654HST

Vs30

0

200

400

600

800

1000

1200

0 20 40 60 80 100

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 655LAF

NEHRP CLASS: D

Vs30 255 (m/s)

SUB-CLASS DLocation Los Angeles, N. Faring

NGA Site ID 90016

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 34 05.358

GPS LONG (WEST 118 26.084

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/13/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A106.—SASW site classification and location information for site 655LAF. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080

Vs (m/s)

z (m)

655LAF

Vs30

0

50

100

150

200

250

300

350

0 20 40 60 80

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 656RPV

NEHRP CLASS: C

Vs30 501 (m/s)

SUB-CLASS CLocation Ranch Palos Verdes

NGA Site ID 14404

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 33 44.724

GPS LONG (WEST 118 23.886

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/13/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A108.—SASW site classification and location information for site 656RPV. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720

Vs (m/s)

z (m)

656RPV

Vs30

0

100

200

300

400

500

600

0 20 40 60 80 100

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 657MFC

NEHRP CLASS: C

Vs30 477 (m/s)

SUB-CLASS CLocation Malibu - Las Flores Canyon

NGA Site ID 90050

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 34 02.720

GPS LONG (WEST 118 38.344

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/14/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

curve)

(Inverted-theoretical-dispersion curve versus average field

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A110.—SASW site classification and location information for site 657MFC. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080

Vs (m/s)

z (m)

657MFC

Vs30

0

100

200

300

400

500

600

700

0 20 40 60

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 658WDH

NEHRP CLASS: D

Vs30 265 (m/s)

SUB-CLASS DLocation Woodland Hills

NGA Site ID 24807

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 34 10.009

GPS LONG (WEST 118 35.833

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/14/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A112.—SASW site classification and location information for site 658WDH. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080

Vs (m/s)

z (m)

658WDH

Vs30

0

50

100

150

200

250

300

350

400

0 10 20 30 40 50

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 659CAM

NEHRP CLASS: D

Vs30 321 (m/s)

SUB-CLASS DLocation Camarillo

NGA Site ID 24863

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 34 13.431

GPS LONG (WEST 118 59.688

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/14/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A114.—SASW site classification and location information for site 659CAM. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720

Vs (m/s)

z (m)

659CAM

Vs30

-50

50

150

250

350

450

550

650

750

0 50 100 150

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 660SLO

NEHRP CLASS: C

Vs30 481 (m/s)

SUB-CLASS CLocation San Luis Obispo

NGA Site ID 1083

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 35 17.079

GPS LONG (WEST 120 39.641

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/15/2004

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A116.—SASW site classification and location information for site 660SLO. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

10

15

20

25

30

0 360 720 1080

Vs (m/s)

z (m)

660SLO

Vs30 0

100

200

300

400

500

600

700

800

900

0 20 40 60 80 100

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)

NGA-PEER Site Classification

Site ID 661JBO

NEHRP CLASS: D

Vs30 372 (m/s)

SUB-CLASS CLocation JB Overpass 

NGA Site ID 47315

State CALIFORNIA

POSITION DEGREES DECIMAL MINUTES

GPS LAT (NORTH) 36 51.698

GPS LONG (WEST 121 34.696

Data Type SWEPT-SINE SASW

Investigators KAYEN, THOMPSON, MINASIAN, CARKIN

Date collected 1/15/2003

(Merged Field-Dispersion Curves)

TEST METHOD CONTINUOUS HARMONIC WAVE-SASW

PROJECT NAME PEER 1LO2 NGA MODELS

SPONSORS PEER, Caltrans, CEC, PG&E

SITE SUB CLASS: Vs30 (m/s)

A >1500 m/s

B+ 1080 < Vs30 ≤ 1500 m/s

B- 720 < Vs30 ≤ 1080 m/s

C+ 540 < Vs30 ≤ 720 m/s

C- 360 < Vs30 ≤ 540 m/s

D+ 270 < Vs30 ≤ 360 m/s

D- 180 < Vs30 ≤ 270 m/s

E <180 m/s

F Special Soil Conditions: Liquefiable soils; quick 

and high sensitivity clays; collapsible cemented soils; 

peats>3m; high (>75) PI soils thicker than 8m; 

soft/medium stiff clays thicker than 36m.

(Inverted-theoretical-dispersion curve versus average field curve)

(Vs profile in upper 30 meters (solid) and Vs30 (dashed) 

Figure A118.—SASW site classification and location information for site 661JBO. The layered inversion model of shear wave velocity in the upper 30 meters is presented in

the middle plot. The site dispersion curves are presented in the upper-right plot, and the comparison between the average site dispersion curve and theoretical dispersion

curve is presented in the lower-left.

0

5

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15

20

25

30

0 360 720

Vs (m/s)

z (m)

661JBO

Vs30

0

50

100

150

200

250

300

350

400

450

0 10 20 30 40 50

Frequency (Hz)

Phase Velocity (m/s)

Field Ave. Velocity (m/s)

Inverted Phase Velocity (m/s)