Identification_Information:
  Citation:
    Citation_Information:
      Originator: Petersen, Mark D.
      Originator: Moschetti, Morgan P.
      Originator: Powers, Peter M.
      Originator: Mueller, Charles S.
      Originator: Haller, Kathleen M.
      Originator: Frankel, Arthur D.
      Originator: Zeng, Yuehua
      Originator: Rezaeian, Sanaz
      Originator: Harmsen, Stephen C.
      Originator: Boyd, Oliver S.
      Originator: Field, Edward H.
      Originator: Chen, Rui
      Originator: Luco, Nicolas
      Originator: Wheeler, Russell L.
      Originator: Williams, Robert A.
      Originator: Olsen, Anna H.
      Originator: Rukstales, Kenneth S.
      Publication_Date: 2015
      Title:
        Peak Horizontal Acceleration
        With 2 Percent Probability of Exceedance in 50 Years
        (Sheet 2 of 6)
        [shapefile containing arcs, uspga250arc.shp]
      Edition: version 1.0
      Geospatial_Data_Presentation_Form: map
      Series_Information:
        Series_Name: U.S. Geological Survey Scientific Investigations Map
        Issue_Identification: 3325
      Publication_Information:
        Publication_Place: Denver, Colorado
        Publisher: U.S. Geological Survey
      Online_Linkage: http://dx.doi.org/10.3133/sim3325
      Larger_Work_Citation:
        Citation_Information:
          Originator: Petersen, Mark D.
          Originator: Moschetti, Morgan P.
          Originator: Powers, Peter M.
          Originator: Mueller, Charles S.
          Originator: Haller, Kathleen M.
          Originator: Frankel, Arthur D.
          Originator: Zeng, Yuehua
          Originator: Rezaeian, Sanaz
          Originator: Harmsen, Stephen C.
          Originator: Boyd, Oliver S.
          Originator: Field, Edward H.
          Originator: Chen, Rui
          Originator: Luco, Nicolas
          Originator: Wheeler, Russell L.
          Originator: Williams, Robert A.
          Originator: Olsen, Anna H.
          Originator: Rukstales, Kenneth S.
          Publication_Date: 2015
          Title: Seismic-Hazard Maps for the Conterminous United States, 2014
          Edition: version 1.0
          Geospatial_Data_Presentation_Form: map
          Series_Information:
            Series_Name: Scientific Investigations Map
            Issue_Identification: 3325
          Publication_Information:
            Publication_Place: Denver, Colorado
            Publisher: U.S. Geological Survey
          Online_Linkage: http://dx.doi.org/10.3133/sim3325
  Description:
    Abstract:
      Probabilistic seismic-hazard maps were prepared for the conterminous
      United States portraying peak horizontal acceleration and horizontal
      spectral response acceleration for 0.2- and 1.0-second periods with probabilities
      of exceedance of 10 percent in 50 years and 2 percent in 50 years.  This particular
      data set is for peak horizontal acceleration with a 2 percent probability
      of exceedance in 50 years.  All of the maps were prepared by combining the
      hazard derived from spatially smoothed historical seismicity with the hazard
      from fault-specific sources.  The acceleration values contoured are
      the random horizontal component.  The reference site condition is firm
      rock, defined as having an average shear-wave velocity of 760 m/sec
      in the top 30 meters corresponding to the boundary between NEHRP
      (National Earthquake Hazards Reduction program) site classes B and C.

      This data set represents the results of calculations of hazard curves
      for a grid of points with a spacing of 0.05 degrees in latitude and
      longitude.  The grid of points was contoured to produce the final
      representation of the seismic hazard.
    Purpose:
      This map is intended to summarize the available quantitative
      information about seismic ground-motion hazard for the conterminous
      United States from geologic and geophysical sources.
    Supplemental_Information:
      A description of how the underlying geologic and geophysical data
      were prepared as well as the methodology used in calculating hazard
      for a geographic location can be found in the following report:

      Petersen, M.D., Moschetti, M.P., Powers, P.M., Mueller, C.S., Haller, K.M.,
      Frankel, A.D., Zeng, Yuehua, Rezaeian, Sanaz, Harmsen, S.C., Boyd, O.S.,
      Field, Ned, Chen, Rui, Rukstales, K.S., Luco, Nico, Wheeler, R.L., Williams, R.A.,
      and Olsen, A.H., 2014, Documentation for the 2014 Update of the United States
      National Seismic Hazard Maps: U.S. Geological Survey Open-File Report 2014-1091,
      243 p.
      (http://pubs.usgs.gov/of/2014/1091/)
  Time_Period_of_Content:
    Time_Period_Information:
      Single_Date/Time:
        Calendar_Date: 2014
    Currentness_Reference: publication date
  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: As needed
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -125.0 degrees
      East_Bounding_Coordinate: -65.0 degrees
      North_Bounding_Coordinate: 50.0 degrees
      South_Bounding_Coordinate: 24.6 degrees
  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: none
      Theme_Keyword: Seismic
      Theme_Keyword: Earthquake
      Theme_Keyword: Hazard
      Theme_Keyword: Risk
    Place:
      Place_Keyword_Thesaurus: http://geonames.usgs.gov/
      Place_Keyword: Alabama
      Place_Keyword: Arizona
      Place_Keyword: Arkansas
      Place_Keyword: California
      Place_Keyword: Colorado
      Place_Keyword: Connecticut
      Place_Keyword: Delaware
      Place_Keyword: District of Columbia
      Place_Keyword: Florida
      Place_Keyword: Georgia
      Place_Keyword: Idaho
      Place_Keyword: Illinois
      Place_Keyword: Indiana
      Place_Keyword: Iowa
      Place_Keyword: Kansas
      Place_Keyword: Kentucky
      Place_Keyword: Louisiana
      Place_Keyword: Maine
      Place_Keyword: Maryland
      Place_Keyword: Massachusetts
      Place_Keyword: Michigan
      Place_Keyword: Minnesota
      Place_Keyword: Mississippi
      Place_Keyword: Missouri
      Place_Keyword: Montana
      Place_Keyword: Nebraska
      Place_Keyword: Nevada
      Place_Keyword: New Hampshire
      Place_Keyword: New Jersey
      Place_Keyword: New Mexico
      Place_Keyword: New York
      Place_Keyword: North Carolina
      Place_Keyword: North Dakota
      Place_Keyword: Ohio
      Place_Keyword: Oklahoma
      Place_Keyword: Oregon
      Place_Keyword: Pennsylvania
      Place_Keyword: Rhode Island
      Place_Keyword: South Carolina
      Place_Keyword: South Dakota
      Place_Keyword: Tennessee
      Place_Keyword: Texas
      Place_Keyword: Utah
      Place_Keyword: Vermont
      Place_Keyword: Virginia
      Place_Keyword: Washington
      Place_Keyword: West Virginia
      Place_Keyword: Wisconsin
      Place_Keyword: Wyoming
      Place_Keyword: USA
      Place_Keyword: United States
  Access_Constraints: None
  Use_Constraints:
    The data are not to be used for areas outside the conterminous United States.
    Acknowledgment of  the U.S. Geological Survey, National Seismic Hazard Mapping Project
    would be appreciated in products derived from these data.
  Point_of_Contact:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: Ken Rukstales
        Contact_Organization: U.S. Geological Survey - Geologic Hazards Science Center
      Contact_Address:
        Address_Type: mailing address
        Address: Box 25046, MS 966
        City: Denver
        State_or_Province: Colorado
        Postal_Code: 80225
        Country: USA
      Contact_Voice_Telephone: 303-273-8677
      Contact_Electronic_Mail_Address: rukstales@usgs.gov
  Browse_Graphic:
    Browse_Graphic_File_Name: http://dx.doi.org/10.3133/sim3325
    Browse_Graphic_File_Description: Full-size, complete version of peak horizontal acceleration, 2 percent probability of exceedance in 50 years for the conterminous United States
    Browse_Graphic_File_Type: PDF
  Native_Data_Set_Environment:
    Microsoft Windows 7 Enterprise, Service Pack 1
    ESRI ArcGIS 10.1 Service Pack 1
  Cross_Reference:
    Citation_Information:
      Originator: Petersen, Mark D.
      Originator: Moschetti, Morgan P.
      Originator: Powers, Peter M.
      Originator: Mueller, Charles S.
      Originator: Haller, Kathleen M.
      Originator: Frankel, Arthur D.
      Originator: Zeng, Yuehua
      Originator: Rezaeian, Sanaz
      Originator: Harmsen, Stephen C.
      Originator: Boyd, Oliver S.
      Originator: Field, Edward H.
      Originator: Chen, Rui
      Originator: Rukstales, Kenneth S.
      Originator: Luco, Nicolas
      Originator: Wheeler, Russell L.
      Originator: Williams, Robert A.
      Originator: Olsen, Anna H.
      Publication_Date: 2014
      Title: Documentation for the 2014 Update of the National Seismic-Hazard Maps
      Series_Information:
        Series_Name: U.S. Geological Survey Open-File Report
        Issue_Identification: 2014-1091
      Publication_Information:
        Publication_Place: Denver, Colorado
        Publisher: U.S. Geological Survey
      Online_Linkage: http://pubs.usgs.gov/of/2014/1091/
Data_Quality_Information:
  Attribute_Accuracy:
    Attribute_Accuracy_Report:
      This data set is based on a theoretical model.  The following resources
      provide information on quality assessment for the data set:

      Petersen, M.D., Moschetti, M.P., Powers, P.M., Mueller, C.S., Haller, K.M.,
      Frankel, A.D., Zeng, Yuehua, Rezaeian, Sanaz, Harmsen, S.C., Boyd, O.S.,
      Field, Ned, Chen, Rui, Rukstales, K.S., Luco, Nico, Wheeler, R.L., Williams, R.A.,
      and Olsen, A.H., 2014, Documentation for the 2014 Update of the United States
      National Seismic Hazard Maps: U.S. Geological Survey Open-File Report 2014-1091,
      243 p.
  Logical_Consistency_Report:
    Arc topology is present.  Data were checked for dangles and
    connectivity using topology tools in ArcGIS and visually.
  Completeness_Report: Data are complete.  No features were generalized.  All features are attributed.
  Positional_Accuracy:
    Horizontal_Positional_Accuracy:
      Horizontal_Positional_Accuracy_Report:
        The location of features is based on theoretical calculations of a
        seismological model for the study area.  The location of each point
        is considered to be correct within the confines of computer accuracy.
  Lineage:
    Process_Step:
      Process_Description:
        The data to produce the maps were originally an ASCII file of grid
        points having a latitude and longitude spacing of 0.05 degrees.  Each
        grid point had an associated acceleration value calculated from the
        prescribed seismological model.  The data were imported into a grid
        and then contoured using ArcGIS.  The desired final contours were
        selected and polygon and arc topology were ascertained as well as
        appropriate feature attributes.
      Process_Date: 2014
Spatial_Data_Organization_Information:
  Direct_Spatial_Reference_Method: Vector
  Point_and_Vector_Object_Information:
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: String
      Point_and_Vector_Object_Count: 460
Spatial_Reference_Information:
  Horizontal_Coordinate_System_Definition:
    Planar:
      Map_Projection:
        Map_Projection_Name: Albers Conical Equal Area
        Albers_Conical_Equal_Area:
          Standard_Parallel: 29.500000
          Standard_Parallel: 45.500000
          Longitude_of_Central_Meridian: -95.000000
          Latitude_of_Projection_Origin: 0.000000
          False_Easting: 0.000000
          False_Northing: 0.000000
      Planar_Coordinate_Information:
        Planar_Coordinate_Encoding_Method: coordinate pair
        Coordinate_Representation:
          Abscissa_Resolution: 0.0001
          Ordinate_Resolution: 0.0001
        Planar_Distance_Units: meters
    Geodetic_Model:
      Horizontal_Datum_Name: D_Clarke_1866
      Ellipsoid_Name: Clarke 1866
      Semi-major_Axis: 6378206.400000
      Denominator_of_Flattening_Ratio: 294.978698
Entity_and_Attribute_Information:
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: uspga250arc.shp
      Entity_Type_Definition: contours of peak horizontal acceleration, 2 percent probability of exceedance in 50 years, %g
      Entity_Type_Definition_Source: USGS
    Attribute:
      Attribute_Label: FID
      Attribute_Definition: Internal feature number.
      Attribute_Definition_Source: ESRI
      Attribute_Domain_Values:
        Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated.
    Attribute:
      Attribute_Label: Shape
      Attribute_Definition: Feature geometry.
      Attribute_Definition_Source: ESRI
      Attribute_Domain_Values:
        Unrepresentable_Domain: Coordinates defining the features.
    Attribute:
      Attribute_Label: ACC_VAL
      Attribute_Definition: Acceleration value in percent of gravity that the contour represents.
      Attribute_Definition_Source: USGS
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: 2
          Enumerated_Domain_Value_Definition: acceleration value in units of %g
          Enumerated_Domain_Value_Definition_Source: USGS
        Enumerated_Domain:
          Enumerated_Domain_Value: 4
          Enumerated_Domain_Value_Definition: acceleration value in units of %g
          Enumerated_Domain_Value_Definition_Source: USGS
        Enumerated_Domain:
          Enumerated_Domain_Value: 6
          Enumerated_Domain_Value_Definition: acceleration value in units of %g
          Enumerated_Domain_Value_Definition_Source: USGS
        Enumerated_Domain:
          Enumerated_Domain_Value: 8
          Enumerated_Domain_Value_Definition: acceleration value in units of %g
          Enumerated_Domain_Value_Definition_Source: USGS
        Enumerated_Domain:
          Enumerated_Domain_Value: 10
          Enumerated_Domain_Value_Definition: acceleration value in units of %g
          Enumerated_Domain_Value_Definition_Source: USGS
        Enumerated_Domain:
          Enumerated_Domain_Value: 12
          Enumerated_Domain_Value_Definition: acceleration value in units of %g
          Enumerated_Domain_Value_Definition_Source: USGS
        Enumerated_Domain:
          Enumerated_Domain_Value: 14
          Enumerated_Domain_Value_Definition: acceleration value in units of %g
          Enumerated_Domain_Value_Definition_Source: USGS
        Enumerated_Domain:
          Enumerated_Domain_Value: 16
          Enumerated_Domain_Value_Definition: acceleration value in units of %g
          Enumerated_Domain_Value_Definition_Source: USGS
        Enumerated_Domain:
          Enumerated_Domain_Value: 18
          Enumerated_Domain_Value_Definition: acceleration value in units of %g
          Enumerated_Domain_Value_Definition_Source: USGS
        Enumerated_Domain:
          Enumerated_Domain_Value: 20
          Enumerated_Domain_Value_Definition: acceleration value in units of %g
          Enumerated_Domain_Value_Definition_Source: USGS
        Enumerated_Domain:
          Enumerated_Domain_Value: 30
          Enumerated_Domain_Value_Definition: acceleration value in units of %g
          Enumerated_Domain_Value_Definition_Source: USGS
        Enumerated_Domain:
          Enumerated_Domain_Value: 40
          Enumerated_Domain_Value_Definition: acceleration value in units of %g
          Enumerated_Domain_Value_Definition_Source: USGS
        Enumerated_Domain:
          Enumerated_Domain_Value: 50
          Enumerated_Domain_Value_Definition: acceleration value in units of %g
          Enumerated_Domain_Value_Definition_Source: USGS
        Enumerated_Domain:
          Enumerated_Domain_Value: 60
          Enumerated_Domain_Value_Definition: acceleration value in units of %g
          Enumerated_Domain_Value_Definition_Source: USGS
        Enumerated_Domain:
          Enumerated_Domain_Value: 80
          Enumerated_Domain_Value_Definition: acceleration value in units of %g
          Enumerated_Domain_Value_Definition_Source: USGS
        Enumerated_Domain:
          Enumerated_Domain_Value: 120
          Enumerated_Domain_Value_Definition: acceleration value in units of %g
          Enumerated_Domain_Value_Definition_Source: USGS
        Enumerated_Domain:
          Enumerated_Domain_Value: 160
          Enumerated_Domain_Value_Definition: acceleration value in units of %g
          Enumerated_Domain_Value_Definition_Source: USGS
        Enumerated_Domain:
          Enumerated_Domain_Value: 200
          Enumerated_Domain_Value_Definition: acceleration value in units of %g
          Enumerated_Domain_Value_Definition_Source: USGS
    Attribute:
      Attribute_Label: VALLEY
      Attribute_Definition: A topological indicator that tells whether the area contained within the arc is a local minimum (valley) or not.
      Attribute_Definition_Source: USGS
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: 0
          Enumerated_Domain_Value_Definition: Area is not a local minimum (valley)
          Enumerated_Domain_Value_Definition_Source: USGS
        Enumerated_Domain:
          Enumerated_Domain_Value: 1
          Enumerated_Domain_Value_Definition: Area is a local minimum (valley)
          Enumerated_Domain_Value_Definition_Source: USGS
Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: U.S. Geological Survey
      Contact_Address:
        Address_Type: mailing address
        Address: USGS, Information Services
        Address: Box 25286, Mail Stop 306
        City: Denver
        State_or_Province: Colorado
        Postal_Code: 80225
        Country: USA
      Contact_Voice_Telephone: 1-888-ASK-USGS
      Contact_Facsimile_Telephone: 303-202-4693
      Contact_Electronic_Mail_Address: usgsstore@usgs.gov
  Resource_Description:
    U.S. Geological Survey
    Scientific Investigations Map 3325
    Seismic-Hazard Maps for the Conterminous United States
    Peak Horizontal Acceleration
    With 2 Percent Probability of Exceedance in 50 Years
    Sheet 2 of 6
  Distribution_Liability:
    This database, identified as SIM 3325, has been approved for release and
    publication by the U.S. Geological Survey (USGS). Although this database has been
    subjected to rigorous review and is substantially complete, the USGS reserves
    the right to revise the data pursuant to further analysis and review.
    Furthermore, it is released on condition that neither the USGS nor the U.S
    Government shall be held liable for any damages resulting from its
    authorized or unauthorized use.

    Although these data have been processed successfully on a computer system at
    the U.S. Geological Survey (USGS), no warranty expressed or implied is made
    regarding the display or utility of the data on any other system, or for general
    or scientific purposes, nor shall the act of distribution constitute any such
    warranty.  The USGS or the U.S. Government shall not be held liable for improper
    or incorrect use of the data described and/or contained herein.

    Any use of trade, product, or firm names is for descriptive purposes only and
    does not imply endorsement by the U.S. Government.

    Although this information product, for the most part, is in the public domain,
    it also may contain copyrighted materials as noted in the text. Permission to
    reproduce copyrighted items must be secured from the copyright owner.
  Standard_Order_Process:
    Digital_Form:
      Digital_Transfer_Information:
        Format_Name: PDF
        Format_Version_Number: 10.1
        Format_Specification: Adobe 10.1
        Transfer_Size: 10.4
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: http://pubs.usgs.gov/sim/3325/
              Network_Resource_Name: http://dx.doi.org/10.3133/sim3325/
    Fees: none
Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: U.S. Geological Survey
      Contact_Address:
        Address_Type: mailing address
        Address: USGS, Information Services
        Address: Box 25286, Mail Stop 306
        City: Denver
        State_or_Province: Colorado
        Postal_Code: 80225
        Country: USA
      Contact_Voice_Telephone: 1-888-ASK-USGS
      Contact_Facsimile_Telephone: (303) 202-4693
      Contact_Electronic_Mail_Address: usgsstore@usgs.gov
  Resource_Description: Downloadable geospatial data sets in shapefile format are available.
  Distribution_Liability:
    This database, identified as SIM 3325, has been approved for release and
    publication by the U.S. Geological Survey (USGS). Although this database has been
    subjected to rigorous review and is substantially complete, the USGS reserves
    the right to revise the data pursuant to further analysis and review.
    Furthermore, it is released on condition that neither the USGS nor the U.S
    Government shall be held liable for any damages resulting from its
    authorized or unauthorized use.

    Although these data have been processed successfully on a computer system at
    the U.S. Geological Survey (USGS), no warranty expressed or implied is made
    regarding the display or utility of the data on any other system, or for general
    or scientific purposes, nor shall the act of distribution constitute any such
    warranty.  The USGS or the U.S. Government shall not be held liable for improper
    or incorrect use of the data described and/or contained herein.

    Any use of trade, product, or firm names is for descriptive purposes only and
    does not imply endorsement by the U.S. Government.

    Although this information product, for the most part, is in the public domain,
    it also may contain copyrighted materials as noted in the text. Permission to
    reproduce copyrighted items must be secured from the copyright owner.
  Standard_Order_Process:
    Digital_Form:
      Digital_Transfer_Information:
        Format_Name: Shapefile
        Format_Version_Number: 10.1
        Format_Specification: ArcGIS version 10.1 shapefile format
        Format_Information_Content: Seismic-Hazard Map for the Conterminous United States, Peak Horizontal Acceleration With 2 Percent Probability of Exceedance in 50 Years
        File_Decompression_Technique: Files need to be decompressed using winzip or similar utility
        Transfer_Size: 4.2
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: http://pubs.usgs.gov/sim/3325/
              Network_Resource_Name: http://dx.doi.org/10.3133/sim3325/
    Fees: none
Metadata_Reference_Information:
  Metadata_Date: 20141124
  Metadata_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: U.S. Geological Survey - Geologic Hazards Team
        Contact_Person: Ken Rukstales
      Contact_Address:
        Address_Type: mailing address
        Address: Box 25046, MS 966
        City: Denver
        State_or_Province: Colorado
        Postal_Code: 80225
        Country: USA
      Contact_Voice_Telephone: 303-273-8677
      Contact_Electronic_Mail_Address: rukstales@usgs.gov
  Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
  Metadata_Standard_Version: FGDC-STD-001-1998
  Metadata_Time_Convention: local time
