July 1st 2019
Documentation for Blind Prediction Study Step 1
We thank you for accepting our invitation to participate as an analyst in Step 1 of the blind prediction for the soilmodel estimation using non-invasive data. Your analytic contributions will be consisted of the processed data andthe soil model including the relevant parametric information. For your participation, you will be acknowledged
directly when the report on the blind test is presented. However, your identity will remain masked from your specificanalytic contributions as results will be codified. The test data consist of unpublished recordings at the site. The
data were collected by the local organizing committee of ESG6 and contain surface recording in arrays include
nested-triangle arrays for microtremor measurements and in line arrays for active source measurement with varying
inter-receiver spacings. We are currently at Step 1 of the blind test and your instructions are as follows :(1) Download the data (DataBPstep1.zip), metadata (DocumentBPstep1.pdf) & report template (Step1dispersion.AbeK.xlsx, Step1-structure.AbeK.xlsx, Step1-procedure.AbeK.docx) from the web site
http://sds.dpri.kyoto-u.ac.jp/esg6-bp/
The data include both passive and active data. Passive data contain three-component microtremor records of thenested-triangle arrays. We also distribute the vertical records of the active source measurements.
(2) You are requested to analyze the vertical component data of the microtremors in the arrays and/or seismic
waves in the active source measurement to obtain a dispersion curve for Rayleigh-wave using algorithm(s) of yourchoice. A 1D structural model estimated using the dispersion curve for Rayleigh-wave is also requested.
Furthermore, you are welcomed to use the data of the horizontal component(s) of microtremors for a better
estimation, as an optional analysis for an additional soil model.
(3) Document your parameters and results by filling the columns for each tab in the respective Step1-structure.xlsx
and Step1-dispersion.xlsx report template file provided in (1). Please also describe your procedure of the analysis
in a word-file within about 1000 words.
(4) Attach and reply with your files to esg6-bp@jaee.gr.jp (please write “BP Step1 results <Surname>” in thesubject). Append your surname and first name's initial to the files containing your results, e.g., Step1structure.Abe.K.xlsx. Please note the scheduled deadline for the completion of Step 1 is 6th December 2019, at
23:59:59 (Japan Standard Time).
(5) The participants are encouraged to submit abstracts of your results to the Blind Prediction Special Session
during ESG6 (http://esg6.jp/index.html) by 6th December 2019, and present your results.
1. Information of target station site-1-1.1. Station location :Rendaiji 4-chome, Nishi ward, Kumamoto City, Kumamoto Prefecture, Japan
32.775679N, 130.687920E, Elevation 9.4m（From GSI map）

1.1.1. Strong motion station
A strong motion recorder has been installed on the surface as shown in the following figures.

1.2. A priori geological information :Surface geology at the station is Late Pleistocene to Holocene marine and non-marine sediments from
Seamless geological map display system by GSJ, AIST

GeomapNavi (https://gbank.gsj.jp/geonavi/)
2. Existing models
2.1. Profile from J-SHIS (Japan Seismic Hazard Information System) by NIEDJ-SHIS Version2 (http://www.j-shis.bosai.go.jp/map/?lang=en) provides a 1D profile of deep part of
sedimentary layers as shown in the following table. Shallow soil part is not included in the system. The information
for surface geology, Vs30, amplification factor from the seismic bedrock, is also available in the system.

-2-Vp(m/s)
2600
5000
5500
6000

Vs(m/s)
1200
2700
3200
3400

Density(g/cm3)
2.15
2.50
2.65
2.75

Thickness(m)
466
498
1041
-

2.2. Profile from HERP (The Headquarters of Earthquake Research Promotion)
by MEXT (Ministry of Education, Culture, Sports, Science and Technology) of Japan

Vp(m/s)
1700
1800
2200
2700
3500
4200
5500

Vs(m/s)
350
500
800
1300
2000
2400
3200

Density(g/cm3)
1.80
1.95
2.07
2.20
2.35
2.45
2.65

Thickness(m)
26142
263
127
397488
1757

Profile of JIVSM (Japan Integrated Velocity Structure Model)

JIVSM (Japan Integrated Velocity. Structure Model) was established for estimating long-period strong groundmotion due to mega-thrust earthquakes occurring around the island of Japan. The report of the long-period groundmotionestimation

wasdistributedbyHERP(onlyinJapanese)(https://www.jishin.go.jp/evaluation/seismic_hazard_map/lpshm/12_choshuki_dat/). See Koketsu et al. (2014)
for details about JIVSM.
Koketsu, K., H. Miyake, H. Suzuki (2012). Japan Integrated Velocity Structure Model Version 1, Proceedings ofthe 15th World Conference on Earthquake Engineering, Lisbon, Portugal, Oct. 12–17, Paper No. 1773.
2.3. Profiles available in KuniJiban

Kuni-jiban (http://www.kunijiban.pwri.go.jp/jp/index.html) (in Japanese) is an information about the subsurface
structure of Japan Islands distributed by the Ministry of Infrastructure, Land and Transportation.
-3-3. Available References
3.1. “Comprehensive research project for the major active faults related to the 2016 Kumamoto earthquake" byMEXT, FY2016 Progress Reporthttps://www.jishin.go.jp/main/chousakenkyuu/kumamoto_sogochousa/h28/h28kumamoto_sogochousa_3_2.pdf
Cross-section in pp.199-200
3.2. Chimoto et al. (2016) Estimation of shallow S-wave velocity structure using microtremor array exploration at
temporary strong motion observation stations for aftershocks of the 2016 Kumamoto earthquake, Earth, Planets
and Space, 68: 206, https://doi.org/10.1186/s40623-016-0581-3
KC04(32.78440/130.70602) about 2km NE to the target site
Vp(m/s)2798621180

Vs(m/s)161497500

Density(g/cm3)
1.60
1.80
1.90Thickness(m)
16.3
1.0-

4. DATA
4.1. Passive data
4.1.1. File format for Passive data-------------------------------------------------------------------------------------------------------------SITE CODE= DOUBLE TRIANGULAR KUM-LL
LAT.= 32.775586
LON.= 130.687404
SAMPLING RATE= 200Hz
UNIT = kine(cm/s)
INITIAL TIME = 2019 01 24 15:45:00
UD NS EW
0.9029162E-01 0.5159521E-02 0.2740995E-02
0.1464014E+00 -0.2676501E-01 0.1338251E-01
0.9238768E-01 0.3547171E-02 0.1112522E-01…continue…

-------------------------------------------------------------------------------------------------------------The Sampling rate, Unit, initial time of the records are described in a header of each file.

The location information in the header indicates latitude and longitude of the central point of the array.
4.1.2. Instruments
4.1.2.1. Receiver :Tokyo Sokushin, SE-321
Natural period, 10 seconds
Sensitivity, 5V/kine
Three channels (UD, NS, and EW) are available. Therefore it is possible to use Horizontal/Vertical Spectral
Ratio as well as the dispersion result.

No.54.1.2.2. Data logger :Hakusan Corporation, LS8800
200 Hz sampling with 24bit precision. The dynamic range is
128dB. Time correction was done at every 1 hour during themeasurements.

No.2

No.4
No.1

4.1.3. Geometry

No.3

We used 7 sensors to simultaneously collect pair of triangles.
-4-No.6

We performed the measurements of microtremors with the arrays of 5 different sizes (KUM-SS1, S, SM, M, LL).
The side lengths (L) of two triangles of each array are as follows, L=(1, 2), (10,20), (39, 78), (122, 243), (481, 962)
meters.

KUM-LLKUM-LL

No.1

32.775641

130.687920

KUM-LL

No.2

32.778120

130.688534

KUM-LL

No.3

32.774002

130.690078

KUM-LL

No.4

32.774997

130.685110

KUM-LLNo.5

32.779120

130.683571

KUM-LL

No.6

32.777128

130.693645

KUM-LL

No.7

32.770884

130.686522

Average side lengths of double triangles are (481, 962)m
KUM-M

No.1

32.775272

130.688678

KUM-M

No.2

32.775412

130.689396

KUM-M

No.3

32.774681

130.688416

KUM-M

No.4

32.775728

130.688157

KUM-M

No.5

32.776484

130.689090

KUM-M

No.6

32.774377

130.689710

KUM-M

No.7

32.774978

130.687201

KUM-SM

No.1

32.775625

130.688028

KUM-SM

No.2

32.775573

130.688264

KUM-SM

No.3

32.775494

130.687871

KUM-SM

No.4

32.775808

130.687999

KUM-SM

No.5

32.775910

130.688372

KUM-SM

No.6

32.775244

130.688212

KUM-SM

No.7

32.775738

130.687579

KUM-M about (122, 243)m

KUM-SM about (39, 78)m-5-

KUM-S (10, 20)m

KUM-SS1 (1, 2)m4.2. Active source data
4.2.1. File format for Active source data
The file format for active source data is shown in the followings.24 channels recordings of vertical seismic
waves were observed in a one-line with a sampling rate of 0.001 sec.
---------------------------------------------------------------------------------------------------------------------1ch, 2ch, 3ch, … , 24ch
-0.88164286976-0.9456672688-0.96543836672-1.04571761632-1.16149712816-1.05792668992-1.02323097104-0.8981547984-0.7809472648-0.55077142368-0.51569094176-0.42999639792-0.45298011776 -0.4311844232 -0.52921316336 -0.41222128496 -0.319922183184 -0.26066073208 -0.238191680848 -0.253591981664 -0.32727512872 -0.41030131312 -0.51758998864 0.57401606496…continue…
--------------------------------------------------------------------------------------------------------------------4.2.2. Instruments
Instruments used are;
Geode (OYO Corp.) for the recording unit and 24 geophones with a natural frequency of 4.5 Hz (GS-11D,GEOSPACE).

-6-

4.2.3. Geometry
The active source measurement was done along the 36 m survey line at the site. Vertical geophone wasdistributed with an interval of 1.5m. Data for 10 shots are available for each shot-receiver gather. Shot points
were located at both ends of the survey line. We used a sledge hammer for the vertical impact as an artificialsource. Data sampled at an interval of 1 kHz..

-7-5. Terms of use of the distributed data
You can freely use the distributed data as long as you specify that you have used the data provided in the blindprediction of ESG6 and send a copy of your publication to the e-mail address below, when you present or publish
your results derived using these data. We do not take any responsibility for any loss or disadvantage caused by using
the data. The data shall not be distributed to a third-party and must be downloaded by the participants from thespecified URL.
6. Presentation of results for the Blind Prediction exercise
We, local organizing committee, plan to compile and present submitted results and facilitate discussions at theESG6 Symposium during 15-17 March 2021 in Kyoto, Japan. Please note that all the participants are acknowledged
but not all participants can be listed in the authors in the publication of the compiled results at ESG6. Therefore
we recommend the participants to submit abstracts of your results to the Blind Prediction Special Session of ESG6
for a presentation of your results.
7. Deadline for submission of results
Please note that the deadline for submitting your results is scheduled for no later than 6 December 2019 23:59:59(Japan Standard Time), if you want to present at ESG6.
8. Deadline for abstract submission (option)
Please note that the deadline for submitting extended abstracts of your results for Step 1 is 30 July, 2020 23:59:59(Japan Standard Time), if you want to present.

We thank you for your interest and participation in this blind prediction study of ESG6.
With much appreciation,
ESG6. Chair for Blind Prediction Step 1 Working Group YAMANAKA Hiroaki on behalf ofESG6. Local organizing committee
esg6-bp@jaee.gr.jp-8-