Identification_Information:

  Citation:
    Citation_Information:
      Originator: US Geological Survey and the U.S. Geological Survey
      Publication_Date: 20080224
      Publication_Time: 085338 GMT
      Title:
        Advanced National Seismic System (ANSS), ShakeMap,
        Global Region, Maps of ground shaking
        and intensity for event 2008nvbr,
        KEPULAUAN MENTAWAI REGION, INDONESIA
      Edition: Map Version 2; Code Version 3.2.1 GSM
      Geospatial_Data_Presentation_Form: Map
      Online_Linkage: http://earthquake.usgs.gov/eqcenter/shakemap

  Description:
    Abstract:
      ShakeMap is designed as a rapid response tool to portray the
      extent and variation of ground shaking throughout the affected
      region immediately following significant earthquakes. Ground
      motion and intensity maps are derived from peak ground motion
      amplitudes recorded on seismic sensors (accelerometers), with
      interpolation based on both estimated amplitudes where data are
      lacking, and site amplification corrections.  Color-coded
      instrumental intensity maps are derived from empirical relations
      between peak ground motions and Modified Mercalli intensity.
      This ShakeMap describes the event: 2008nvbr,
      KEPULAUAN MENTAWAI REGION, INDONESIA
    Purpose:
      As a rapid response tool, the ShakeMap ground motion values are
      used for emergency response, loss estimation, assessment of damage
      to the lifeline and utility networks, and for providing information
      to the general public.

  Time_Period_of_Content:
    Currentness_Reference: ground condition
    Time_Period_Information:
      Single_Date/Time:
        Calendar_Date: 20080224
        Time_of_Day: 085338 GMT

  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: As needed

  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: 98.064
      East_Bounding_Coordinate: 101.981
      North_Bounding_Coordinate: -0.304
      South_Bounding_Coordinate: -4.304

  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: None
      Theme_Keyword: ShakeMap
      Theme_Keyword: peak ground motions
      Theme_Keyword: shaking intensity
      Theme_Keyword: instrumental intensity
      Theme_Keyword: earthquake damage
      Theme_Keyword: Advanced National Seismic Systems (ANSS)
      Theme_Keyword: US Geological Survey
    Place:
      Place_Keyword_Thesaurus: None
      Place_Keyword: Global

  Access_Constraints: none
  Use_Constraints: none

  Point_of_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: ShakeMap Working Group
        Contact_Person: David J. Wald
      Contact_Position: Geophysicist
      Contact_Address:
        Address_Type: mailing
        Address: N/A
        City: N/A
        State_or_Province: N/A
        Postal_Code: N/A
        Country: USA
      Contact_Voice_Telephone: N/A
      Contact_Facsimile_Telephone: N/A
      Contact_Electronic_Mail_Address: N/A

  Browse_Graphic:
    Browse_Graphic_File_Name: http://earthquake.usgs.gov/shakemap/global/shake/2008nvbr/intensity.html
    Browse_Graphic_File_Description:
      Instrumental Intensity ShakeMap within a web page; all other ShakeMap
      maps and products can be accessed from this site. Typically
      the image itself is 600x400 pixels and about 100k bytes in size.
    Browse_Graphic_File_Type: JPEG

  Cross_Reference:
    Citation_Information:
      Originator: Wald, D.J.
      Originator: Quitoriano, V.
      Originator: Heaton, T.H.
      Originator: Kanamori, H.
      Originator: Scrivner, C.W.
      Originator: Worden, C.B.
      Title:
        TriNet "ShakeMaps": rapid generation of instrumental
        ground motion and intensity maps for earthquakes in
        Southern California
      Publication_Date: 1999
      Series_Information:
        Series_Name: Earthquake Spectra
        Issue_Identification: Vol. 15, No. 3
      Other_Citation_Details: pp 537-556
      Online_Linkage: http://earthquake.usgs.gov/shakemap/global/shake/about.html#references

  Cross_Reference:
    Citation_Information:
      Originator: Wald, D.J.
      Originator: Quitoriano, V.
      Originator: Heaton, T.H.
      Originator: Kanamori, H.
      Title: Relationship between Peak Ground Acceleration, Peak Ground Velocity, and Modified Mercalli Intensity for Earthquakes in California
      Publication_Date: 1999
      Series_Information:
        Series_Name: Earthquake Spectra
        Issue_Identification: Vol. 15, No. 3
      Other_Citation_Details: pp 557-564
      Online_Linkage: http://earthquake.usgs.gov/shakemap/global/shake/about.html#references

  Cross_Reference:
    Citation_Information:
      Originator: Wald, D.J.
      Originator: Worden, C.B.
      Originator: Quitoriano, V.
      Originator: Pankow, K.
      Title: ShakeMap Manual
      Publication_Date: 2003
      Series_Information:
        Series_Name: U.S. Geological Survey [Open File Report]
        Issue_Identification: [ZZZ-03]
      Other_Citation_Details: [160 pp]

Data_Quality_Information:
  Attribute_Accuracy:
    Attribute_Accuracy_Report:
      Slight variations in peak ground motions and spectral values
      may depend on processing. Corrections or changes in station
      and amplitude information are reflected by the authoritative
      seismic network. In addition, changes in magnitude may result
      in changes to estimated ground motions in areas with sparse
      seismic station coverage.

  Completeness_Report:
    Included in this version are data available up to the time processed.
    Additional data (seismic stations) may be added at a later time.
  Logical_Consistency_Report:
    Ground motion data are direct measurements only at the location
    of seismic stations; all other data are interpolated (as
    described in the citations).  Seismic station coverage varies
    in density as well as instrumentation across the region in
    question.  Uncertainty in the reported ground motions generally
    increases with distance from seismic stations, and in areas of
    very low station density may be largely the product of empirical
    relationships.  Uncertainties in ground motions may also arise
    from inaccurate ground motion amplitudes from seismic stations,
    or inaccurate information regarding earthquake epicenter or
    magnitude, as reported by the generating network.

  Lineage:
    Process_Step:
      Process_Description:
        Shaking maps are prepared by contouring shaking information
        interpolated onto a square grid uniformly sampled at a
        spacing of 1 minute (about 1.6 km) throughout California. If
        there were stations at each of the tens of thousands of grid
        points, then the creation of shaking maps would be relatively
        simple. Of course stations are not available for all of these
        grid points, and in many cases grid points may be tens of
        kilometers from the nearest reporting station. The overall
        mapping philosophy is to combine information from individual
        stations, geology (representing site amplification), and the
        distance to the epicenter or causative fault to create the
        best composite map. The procedure produces reasonable estimates
        at grid points located far from available data, while
        preserving the detailed shaking information available for
        regions where there are stations nearby.

        Estimation of shaking over the regional extent for an earthquake
        in California is obtained by the spatial interpolation of the
        measured ground motions with geologically based frequency and
        amplitude-dependent site corrections. We use the California
        Site Condition Map (California Geological Survey, CGS) maps
        of National Earthquake Hazard Reduction Program (NEHRP)
        classification site conditions as the basis for our site
        corrections. These site condition maps have coverage throughout
        the state at 1:250,000 scale (Wills et al., 2000). We use the
        amplification factors of Borcherdt et al. (1994). In addition,
        ShakeMap ground motions in regions of sparse station spacing
        are estimated using ground motion regression, initially from
        a point location at the epicenter. Later, as information about
        fault dimensions became available (in the form of aftershocks,
        source rupture models, and observed surface slip), the fault
        location and rupture dimensions are used as the basis for
        ground motion estimation.

        First, peak ground motion parameters are recovered for each
        station and associated with a particular earthquake origin time
        and epicenter. We then create a coarse, uniformly spaced grid
        of 30-km spaced "phantom" stations. Peak ground motions and
        spectral acceleration values are assigned to each coarse grid
        point using a ground motion attenuation relationship for
        rock sites given the magnitude of the earthquake and distance
        to each grid point.  In practice, we apply a static correction
        to the amplitudes of the regression by using the network-determined
        magnitude, predicting the observed amplitudes, and correcting for
        an amplitude bias term between the predictions and the data.

        Site corrections are then used to interpolate from ground
        motions recorded on a fairly sparse, non-uniformly spaced
        network of stations to maps showing spatially continuous
        functions (i.e., contours).  Prior to interpolation, we reduce
        the ground motion amplitudes to a common reference, in this
        case bedrock motions. Peak ground motion amplitudes from the
        seismic stations are corrected to rock site conditions; and
        the observations (corrected to rock) and the coarse phantom
        stations (computed for rock) are then interpolated to a fine
        rock site grid (roughly 1.6-km spacing). We scale the peak
        acceleration (PGA) amplitude with the Borcherdt et al. (1994)
        short-period amplification factors while the peak ground
        velocity (PGV) values are corrected with the mid-period
        factors. Response spectral values are scaled by the short-period
        factors at 0.3 sec, and by the mid-period response at 1.0 and
        3.0 seconds. The site correction procedure is applied so that
        the original data values are returned at each station; hence,
        the actual recorded motions are preserved in the process and
        the final contours reflect the observations wherever they exist.

        Next, the interpolated rock grid is corrected at each point
        for local site amplification and instrumental intensity map is
        generated by relating the peak ground acceleration or velocity
        at each grid point to intensity as described by Wald et al. (1999).
        This fine grid is saved and exported to the file "grid.xyz". A
        continuous surface is also fit to the fine grid to produce
        the contour maps and GIS formatted maps.

      Process_Date: 20080224
      Process_Time: 085338 GMT

Spatial_Reference_Information:
  Horizontal_Coordinate_System_Definition:
    Geographic:
      Latitude_Resolution: 0.083
      Longitude_Resolution: 0.083
      Geographic_Coordinate_Units: Decimal degrees
    Geodetic_Model:
      Horizontal_Datum_Name: World Geodetic System 1984
      Ellipsoid_Name: WGS 84
      Semi-major_Axis: 6378137
      Denominator_of_Flattening_Ratio: 298.257

Entity_and_Attribute_Information:
  Overview_Description:
    Entity_and_Attribute_Overview:
      File grid.xyz

      Values of the peak amplitudes at the ShakeMap map grid nodes.
      File is ASCII text in the following format:

      First line is a header, space-delimited, with all of the following:
      ><name/CUSPID of event> <mag> <epicentral lat> <epicentral lon>
      ><MMM DD YYYY> <HH:MM:SS timezone>
      ><W bound> <S bound> <E bound> <N bound>
      >(Process time: <time>) <Location String>

      The first 'time' field is the time of the event.
      'Process time' is the time this file was last updated.

      For large or historic earthquakes the "Location String" will
      usually be the name of the earthquake, otherwise it will be
      something of the form "12.1 mi. SSW of Carpinteria, CA"

      The remaining lines are of the form:
      ><lon> <lat> <pga> <pgv> <mmi> <psa03> <psa10> <psa30>

      >pga   = peak ground motion (acceleration, as percent of g)
      >pgv   = peak ground motion (velocity in cm/s)
      >mmi   = estimated instrumental intensity
      >psa03 = spectral acceleration at 0.3 s period, 5% damping (percent of g)
      >psa10 = spectral acceleration at 1.0 s period, 5% damping (percent of g)
      >psa30 = spectral acceleration at 3.0 s period, 5% damping (percent of g)
    Entity_and_Attribute_Detail_Citation: http://earthquake.usgs.gov/shakemap/global/shake/2008nvbr/about_formats.html#xyz

  Overview_Description:
    Entity_and_Attribute_Overview:
      File grid.xml

      Specifies the earthquake and ShakeMap parameters, and values
      of the peak amplitudes at the ShakeMap map grid nodes.  File is XML
      text.

    Entity_and_Attribute_Detail_Citation: http://earthquake.usgs.gov/shakemap/global/shake/2008nvbr/about_formats.html#xml

  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: mmi.dbf (shapefile from "shape.zip" download file)
      Entity_Type_Definition: Polygons of estimated instrumental intensity
      Entity_Type_Definition_Source: ESRI Shapefile Technical Description
    Attribute:
      Attribute_Label: GRID_CODE
      Attribute_Definition: Estimated instrumental intensity (double)
      Attribute_Definition_Source:
        Wald, et al., Relationship between Peak Ground Acceleration, Peak
        Ground Velocity, and Modified Mercalli Intensity for Earthquakes
        in California, Earthquake Spectra, Vol. 15, No. 3, 1999, pp 557-564.
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0.0
          Range_Domain_Maximum: 10.0
          Attribute_Units_of_Measure: Intensity
          Attribute_Measurement_Resolution: 0.1
    Attribute:
      Attribute_Label: VALUE
      Attribute_Definition: Estimated instrumental intensity (double)
      Attribute_Definition_Source:
        Wald, et al., Relationship between Peak Ground Acceleration, Peak
        Ground Velocity, and Modified Mercalli Intensity for Earthquakes
        in California, Earthquake Spectra, Vol. 15, No. 3, 1999, pp 557-564.
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0.0
          Range_Domain_Maximum: 10.0
          Attribute_Units_of_Measure: Intensity
          Attribute_Measurement_Resolution: 0.1
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: pga.dbf (shapefile from "shape.zip" download file)
      Entity_Type_Definition: Polygons of peak ground motion (acceleration)
      Entity_Type_Definition_Source: ESRI Shapefile Technical Description
    Attribute:
      Attribute_Label: GRID_CODE
      Attribute_Definition: Peak ground motion (acceleration, as integer percent of g)
      Attribute_Definition_Source: self-evident
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -200.0
          Range_Domain_Maximum: 200.0
          Attribute_Units_of_Measure: percent of g
          Attribute_Measurement_Resolution: 4
    Attribute:
      Attribute_Label: VALUE
      Attribute_Definition: Peak ground motion (acceleration, as fraction of g)
      Attribute_Definition_Source: self-evident
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -200.0
          Range_Domain_Maximum: 200.0
          Attribute_Units_of_Measure: fraction of g
          Attribute_Measurement_Resolution: 0.04
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: pgv.dbf (shapefile from "shape.zip" download file)
      Entity_Type_Definition: Polygons of peak ground motion (velocity)
      Entity_Type_Definition_Source: ESRI Shapefile Technical Description
    Attribute:
      Attribute_Label: GRID_CODE
      Attribute_Definition: Peak ground motion (velocity in cm/s, integer)
      Attribute_Definition_Source: self-evident
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -500.0
          Range_Domain_Maximum: 500.0
          Attribute_Units_of_Measure: cm/s
          Attribute_Measurement_Resolution: 4
    Attribute:
      Attribute_Label: VALUE
      Attribute_Definition: Peak ground motion (velocity in cm/s, double)
      Attribute_Definition_Source: self-evident
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -500.0
          Range_Domain_Maximum: 500.0
          Attribute_Units_of_Measure: cm/s
          Attribute_Measurement_Resolution: 4
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: psa03.dbf (shapefile (from "shape.zip" download file)
      Entity_Type_Definition: Polygons of spectral acceleration at 0.3 s period, 5% damping
      Entity_Type_Definition_Source: ESRI Shapefile Technical Description
    Attribute:
      Attribute_Label: GRID_CODE
      Attribute_Definition: Spectral acceleration at 0.3 s period, 5% damping (integer percent of g)
      Attribute_Definition_Source: self-evident
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -400.0
          Range_Domain_Maximum: 400.0
          Attribute_Units_of_Measure: percent of g
          Attribute_Measurement_Resolution: 4
    Attribute:
      Attribute_Label: VALUE
      Attribute_Definition: Spectral acceleration at 0.3 s period, 5% damping (fraction of g)
      Attribute_Definition_Source: self-evident
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -400.0
          Range_Domain_Maximum: 400.0
          Attribute_Units_of_Measure: fraction of g
          Attribute_Measurement_Resolution: 0.04
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: psa10.dbf (shapefile from "shape.zip" download file)
      Entity_Type_Definition: Polygons of spectral acceleration at 1.0 s period, 5% damping
      Entity_Type_Definition_Source: ESRI Shapefile Technical Description
    Attribute:
      Attribute_Label: GRID_CODE
      Attribute_Definition: Spectral acceleration at 1.0 s period, 5% damping (integer percent of g)
      Attribute_Definition_Source: self-evident
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -400.0
          Range_Domain_Maximum: 400.0
          Attribute_Units_of_Measure: percent of g
          Attribute_Measurement_Resolution: 4
    Attribute:
      Attribute_Label: VALUE
      Attribute_Definition: Spectral acceleration at 1.0 s period, 5% damping (fraction of g)
      Attribute_Definition_Source: self-evident
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -400.0
          Range_Domain_Maximum: 400.0
          Attribute_Units_of_Measure: fraction of g
          Attribute_Measurement_Resolution: 0.04
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: psa30.dbf (shapefile from "shape.zip" download file)
      Entity_Type_Definition: Polygons of spectral acceleration at 3.0 s period, 5% damping
      Entity_Type_Definition_Source: ESRI Shapefile Technical Description
    Attribute:
      Attribute_Label: GRID_CODE
      Attribute_Definition: Spectral acceleration at 3.0 s period, 5% damping (integer percent of g)
      Attribute_Definition_Source: self-evident
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 2
          Range_Domain_Maximum: 34
          Attribute_Units_of_Measure: percent of g
          Attribute_Measurement_Resolution: 4
    Attribute:
      Attribute_Label: VALUE
      Attribute_Definition: Spectral acceleration at 3.0 s period, 5% damping (fraction of g)
      Attribute_Definition_Source: self-evident
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -400.0
          Range_Domain_Maximum: 400.0
          Attribute_Units_of_Measure: fraction of g
          Attribute_Measurement_Resolution: 0.04

  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: pga.dbf (shapefile from "hazus.zip" download file)
      Entity_Type_Definition:
        Polygons of "mean" ground motion (acceleration), scaled from recorded peak
        values by 15% (empirical correction from peak to mean) to conform to HAZUS input requirements.
      Entity_Type_Definition_Source: ESRI Shapefile Technical Description
    Attribute:
      Attribute_Label: GRID_CODE
      Attribute_Definition: Mean ground motion (acceleration, as integer percent of g)
      Attribute_Definition_Source: self-evident
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -200.0
          Range_Domain_Maximum: 200.0
          Attribute_Units_of_Measure: percent of g
          Attribute_Measurement_Resolution: 4
    Attribute:
      Attribute_Label: VALUE
      Attribute_Definition: Mean ground motion (acceleration, as fraction of g)
      Attribute_Definition_Source: self-evident
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -200.0
          Range_Domain_Maximum: 200.0
          Attribute_Units_of_Measure: fraction of g
          Attribute_Measurement_Resolution: 0.04
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: pgv.dbf (shapefile (from "hazus.zip" download file)
      Entity_Type_Definition:
        Polygons of "mean" ground motion (velocity), scaled from recorded peak
        values by 15% (empirical correction from peak to mean) to conform to HAZUS input requirements.
      Entity_Type_Definition_Source: ESRI Shapefile Technical Description
    Attribute:
      Attribute_Label: GRID_CODE
      Attribute_Definition: Mean ground motion (velocity in inches/sec, integer)
      Attribute_Definition_Source: self-evident
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -200.0
          Range_Domain_Maximum: 200.0
          Attribute_Units_of_Measure: cm/s
          Attribute_Measurement_Resolution: 2
    Attribute:
      Attribute_Label: VALUE
      Attribute_Definition: Mean ground motion (velocity in inches/s, double)
      Attribute_Definition_Source: self-evident
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -500.0
          Range_Domain_Maximum: 500.0
          Attribute_Units_of_Measure: cm/s
          Attribute_Measurement_Resolution: 2.0
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: psa03.dbf (shapefile from "hazus.zip" download file)
      Entity_Type_Definition:
        Polygons of "mean" spectral acceleration at 0.3 s period, 5% damping, scaled from
        recorded peak values by 15% (empirical correction from peak to mean) to conform to HAZUS input
        requirements.
      Entity_Type_Definition_Source: ESRI Shapefile Technical Description
    Attribute:
      Attribute_Label: GRID_CODE
      Attribute_Definition: Mean Spectral acceleration at 0.3 s period, 5% damping (integer percent of g)
      Attribute_Definition_Source: self-evident
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -400.0
          Range_Domain_Maximum: 400.0
          Attribute_Units_of_Measure: percent of g
          Attribute_Measurement_Resolution: 4
    Attribute:
      Attribute_Label: VALUE
      Attribute_Definition:
        Mean spectral acceleration at 0.3 s period, 5% damping (fraction of g), scaled
        from recorded peak values by 15% (empirical correction from peak to mean) to conform to HAZUS input
        requirements.
      Attribute_Definition_Source: self-evident
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -400.0
          Range_Domain_Maximum: 400.0
          Attribute_Units_of_Measure: fraction of g
          Attribute_Measurement_Resolution: 0.04
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: psa10.dbf (shapefile from "hazus.zip" download file)
      Entity_Type_Definition:
        Polygons of mean spectral acceleration at 1.0 s period, 5% damping, scaled from
        recorded peak values by 15% (empirical correction from peak to mean) to conform to HAZUS input
        requirements.
      Entity_Type_Definition_Source: ESRI Shapefile Technical Description
    Attribute:
      Attribute_Label: GRID_CODE
      Attribute_Definition: Mean spectral acceleration at 1.0 s period, 5% damping (integer percent of g)
      Attribute_Definition_Source: self-evident
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -400.0
          Range_Domain_Maximum: 400.0
          Attribute_Units_of_Measure: percent of g
          Attribute_Measurement_Resolution: 4
    Attribute:
      Attribute_Label: VALUE
      Attribute_Definition:
        Mean spectral acceleration at 1.0 s period, 5% damping (fraction of g), scaled from
        recorded peak values by 15% (empirical correction from peak to mean) to conform to HAZUS input
        requirements.
      Attribute_Definition_Source: self-evident
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -400.0
          Range_Domain_Maximum: 400.0
          Attribute_Units_of_Measure: fraction of g
          Attribute_Measurement_Resolution: 0.04

Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: United States Geological Survey, Advanced National Seismic System (ANSS)
        Contact_Person: David J Wald
      Contact_Position: Geophysicist
      Contact_Address:
        Address_Type: mailing address
        Address: P.O. Box 25046
        City: Lakewood
        State_or_Province: CO
        Postal_Code: 80225
        Country: USA
      Contact_Voice_Telephone: 303-273-8441
      Contact_Facsimile_Telephone: (303) 273-8600
      Contact_Electronic_Mail_Address: wald@usgs.gov
  Resource_Description: Shakemap data for 2008nvbr
  Distribution_Liability:
    Some USGS information accessed through this page may be preliminary in
    nature and presented prior to final review and approval by the
    Director of the USGS. This information is provided with the
    understanding that it is not guaranteed to be correct or complete, and
    conclusions drawn from such information are the sole responsibility of
    the user.

    These are automatic computer generated maps and have not necessarily
    been checked by human oversight, so they may contain errors. Further,
    the input data is raw and unchecked, and may contain errors.

    Contours can be misleading since data gaps may exist. Caution should
    be used in deciding which features in the contour patterns are
    required by the data. Ground motions and intensities can vary greatly
    over small distances, so these maps are only approximate; when maps
    are enlarged beyond the limits of the original data in an effort to
    show small areas, the maps are unreliable.

    These maps are preliminary in nature and will be updated as data
    arrives from distributed sources.

    The estimated intensity map is derived from ground motions recorded by
    seismographs and represents Modified Mercalli Intensities (MMI's) that
    are likely to have been associated with the ground motions. Unlike
    conventional Modified Mercalli Intensities, the estimated intensities
    are not based on observations of the earthquake effects on people or
    structures.

    Locations within the same intensity area will not necessarily
    experience the same level of damage since damage depends heavily on
    the type of structure, the nature of the construction, and the details
    of the ground motion at that site. For this reason more or less damage
    than described in the MMI scale may occur.

    Large earthquakes can generate very long-period ground motions that
    can cause damage at great distances from the epicenter; although the
    intensity estimated from the ground motions may be small, significant
    effects to large structures (bridges, tall buildings, storage tanks)
    may be notable.

    The ground motion levels and descriptions associated with each
    intensity value are based on recent damaging earthquakes. There may be
    revisions in these parameters as more data become available or from
    further improvements in methodology.

  Standard_Order_Process:
    Digital_Form:
      Digital_Transfer_Information:
        Format_Name: ESRI shapefile
        Format_Information_Content: Ground shaking intensity, acceleration, and velocity contours
        File_Decompression_Technique: unzip
        Transfer_Size: 2 megabytes
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: http://earthquake.usgs.gov/shakemap/global/shake/2008nvbr/download/shape.zip
              Network_Resource_Name: http://earthquake.usgs.gov/shakemap/global/shake/2008nvbr/download/hazus.zip
    Digital_Form:
      Digital_Transfer_Information:
        Format_Name: Text
        Format_Version_Number: 1.0
        Format_Specification:
          Within lines, values are delimited by spaces.

          First line is a header containing <name/CUSPID of event> <mag>
          <epicentral lat> <epicentral lon> <MMM DD YYYY> <HH:MM:SS
          timezone> <W bound> <S bound> <E bound> <N bound> (Process time:
          <time>) <Location String>

          The remaining lines contain <lon> <lat> <pga> <pgv> <mmi>
          <psa03> <psa10> <psa30>

        Format_Information_Content: Ground-shaking intensity and acceleration data
        File_Decompression_Technique: unzip
        Transfer_Size: 0.5 megabytes
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: http://earthquake.usgs.gov/shakemap/global/shake/2008nvbr/download/grid.xyz.zip
    Fees: none

Metadata_Reference_Information:
  Metadata_Date: 20080224

  Metadata_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: U.S. Geological Survey, GEO-CR-GHT
        Contact_Person: David J. Wald
      Contact_Position: Geophysicist
      Contact_Address:
        Address_Type: mailing
        Address:
          U.S. Geological Survey
          P.O. Box 25046, Mail Stop 966
        City: Denver
        State_or_Province: CO
        Postal_Code: 80225-0046
        Country: USA
      Contact_Voice_Telephone: (303) 273-8441
      Contact_Facsimile_Telephone: (303) 273-8600
      Contact_Electronic_Mail_Address: wald@usgs.gov

  Metadata_Standard_Name: Content Standards for Digital Geospatial Metadata
  Metadata_Standard_Version: FGDC-STD-001-1998