Earthquakes digital map layer with hazard rankings
THIS DIGITAL MAP IS COPYRIGHTED (c) 1999-2003 BY Michael R. Meuser.

This digital map layer is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation.

This digital map layer is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

For a complete copy of the GNU General Public License see: http://www.gnu.org/copyleft/gpl.html and see "gpl.txt" which came as a part of this archive. You can also contact the Free Software Foundation for a copy as follows:

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Informal discussion: See the License for governing terms and conditions. Informally, this is a "copyleft" item that is free to use however you wish (including incorporation into commercial products or derivative works for sale) as long as you pass it on in a way that perpetuates GNU freedom of usage, which means all derived works also must be made available under the GPL. This digital map was contributed by Clary-Meuser Research Network to the Free World Data Foundation archive.

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Contact Information:

Michael R. Meuser
Clary-Meuser Research Network
348A Washington St.
Santa Cruz, CA 95060
831-458-4245
meuser@mapcruzin.com
http://www.mapcruzin.com/

<End of required licensing statement.  This line and all above must accompany map data.>

Earthquakes point layer with hazard rankings. Source - USGS National
Atlas. Available at http://www-atlas.usgs.gov/atlasftp.html.

Identification_Information:
  Citation:
    Citation_Information:
      Originator: U.S. Geological Survey (USGS)
      Publication_Date: 1996
      Title: Earthquakes
      Publication_Information:
        Publication_Place: Reston, Virginia
        Publisher: U.S. Geological Survey

  Description:
    Abstract:
      This data set includes a selection of seismic events above 4.0
      magnitude in and near the United States for the years 1973-1998.
    Purpose:
      The digital data sets are used to create electronic and hard
      copy maps that depict various aspects of the nation.  The data
      can be used to conduct geographic analysis on national and large
      regional scales.  The digital data will provide a basis from
      which future revisions of the atlas can be derived.
    Supplemental_Information:
      Revisions:
        1) 6/29/98 - Corrected ellipsoid name from WGS84 to GRS1980 and 
        changed flattening ratio.

  Time_Period_of_Content:
    Time_Period_Information:
      Single_Date/Time:
        Calendar_Date: 1998
    Currentness_Reference: publication date

  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: Irregular

  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: 172.0
      East_Bounding_Coordinate: -66.0
      North_Bounding_Coordinate: 72.0
      South_Bounding_Coordinate: 18.0

  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: None
      Theme_Keyword: seismic
      Theme_Keyword: earthquakes
    Place:
      Place_Keyword_Thesaurus:
        U.S. Department of Commerce, 1995, Countries, dependencies,
        areas of special sovereignty, and their principal
        administrative divisions (Federal Information Processing
        Standard (FIPS) 10-4): Washington, D.C., National Institute of
        Standards and Technology.
      Place_Keyword: United States

  Access_Constraints: None

  Use_Constraints:
    None.  Acknowledgment of the National Earthquake Information
    Center (NEIC) would be appreciated in products derived from these
    data.

  Point_of_Contact:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: Bruce Wright
        Contact_Organization: U.S. Geological Survey
      Contact_Address:
        Address_Type: mailing address
        Address: 521 National Center
        City: Reston
        State_or_Province: VA
        Postal_Code: 20192
      Contact_Voice_Telephone: 703-648-4528
      Contact_Electronic_Mail_Address: bwright@usgs.gov

Data_Quality_Information:
  Logical_Consistency_Report: 
    No tests for logical consistency were performed on this data set.

  Completeness_Report:
    This data set includes all seismic events in and near the United
    States.  No tests for completeness were performed on this data
    set.

  Lineage:
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: National Earthquake Information Center (NEIC), USGS-Geologic Division
          Publication_Date: 1998
          Title: Earthquake data base
          Publication_Information:
            Publication_Place: Golden, CO
            Publisher: USGS
      Type_of_Source_Media: online
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Range_of_Dates/Times:
            Beginning_Date: 1973
            Ending_Date: 1998
        Source_Currentness_Reference: publication date
      Source_Citation_Abbreviation: n/a
      Source_Contribution: spatial and attribute information
    Process_Step:
      Process_Description:
        The data were extracted from the NEIC Earthquake Search WWW
        site at: http://wwwneic.cr.usgs.gov/neis/epic/epic.html.  The
        data were then loaded into an INFO database.  Latitude and
        Longitude values were written to an external file and used as
        input to the ARC/INFO command GENERATE to create a point
        coverage.  The remaining attributes were joined to the data
        using the command JOINITEM.  A bounding rectangle was used to
        isolate just those earthquakes located in the area of
        interest, standard tics were added and point topology was
        build.  A spot check was conducted to validate that the proper
        attributes were associated with the earthquake locations.
      Process_Date: 1998

Spatial_Data_Organization_Information:
  Direct_Spatial_Reference_Method: Vector

  Point_and_Vector_Object_Information:
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: Point
      Point_and_Vector_Object_Count: 26867

Spatial_Reference_Information:
  Horizontal_Coordinate_System_Definition:
    Geographic:
      Latitude_Resolution: 0.01
      Longitude_Resolution: 0.01
      Geographic_Coordinate_Units: Decimal Degrees
    Geodetic_Model:
      Horizontal_Datum_Name: North American Datum of 1983
      Ellipsoid_Name: GRS1980
      Semi-major_Axis: 6378137
      Denominator_of_Flattening_Ratio: 298.257222

Entity_and_Attribute_Information:
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: QUAKESX020.PAT
      Entity_Type_Definition: Point attribute table
      Entity_Type_Definition_Source: ARC/INFO
    Attribute:
      Attribute_Label: AREA
      Attribute_Definition: Point
      Attribute_Definition_Source: Computed
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: 0.0
          Enumerated_Domain_Value_Definition: n/a
          Enumerated_Domain_Value_Definition_Source: n/a
    Attribute:
      Attribute_Label: PERIMETER
      Attribute_Definition: Point
      Attribute_Definition_Source: Computed
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: 0.0
          Enumerated_Domain_Value_Definition: n/a
          Enumerated_Domain_Value_Definition_Source: n/a
    Attribute:
      Attribute_Label: QUAKESX020#
      Attribute_Definition: Internal feature number
      Attribute_Definition_Source: Computed
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: Sequential unique positive integer
          Enumerated_Domain_Value_Definition: n/a
          Enumerated_Domain_Value_Definition_Source: n/a
    Attribute:
      Attribute_Label: QUAKESX020-ID
      Attribute_Definition: User-assigned feature number
      Attribute_Definition_Source: User-defined
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: Integer
          Enumerated_Domain_Value_Definition: n/a
          Enumerated_Domain_Value_Definition_Source: n/a
    Attribute:
      Attribute_Label: CATALOG_SRC
      Attribute_Definition: Contributing source of earthquake data
      Attribute_Definition_Source: NEIC
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value:
            PDE = Contributed by USGS NEIC, Preliminary Determination of Epicenters
            - Monthly Listing
          Enumerated_Domain_Value_Definition:
            Contributed by USGS NEIC, Preliminary Determination of
            Epicenters - Monthly Listing
          Enumerated_Domain_Value_Definition_Source: NEIC
    Attribute:
      Attribute_Label: YEAR
      Attribute_Definition: Year of the event
      Attribute_Definition_Source: NEIC
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: 1973-1998
          Enumerated_Domain_Value_Definition: n/a
          Enumerated_Domain_Value_Definition_Source: NEIC
    Attribute:
      Attribute_Label: MONTH
      Attribute_Definition: Month of the event
      Attribute_Definition_Source: NEIC
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: 1-12
          Enumerated_Domain_Value_Definition: n/a
          Enumerated_Domain_Value_Definition_Source: n/a
    Attribute:
      Attribute_Label: DAY
      Attribute_Definition: Day of the event
      Attribute_Definition_Source: NEIC
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: 1-31
          Enumerated_Domain_Value_Definition: n/a
          Enumerated_Domain_Value_Definition_Source: n/a
    Attribute:
      Attribute_Label: ORIGIN_TIME
      Attribute_Definition:
        Time of the event in Universal Time Coordinated (UTC) in hours, minutes,
        seconds, and decimal seconds expressed as a single real number.
      Attribute_Definition_Source: NEIC
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: 000000.0 - 235959.9
          Enumerated_Domain_Value_Definition: n/a
          Enumerated_Domain_Value_Definition_Source: n/a
      Attribute_Units_of_Measure: decimal degrees
    Attribute:
      Attribute_Label: LAT
      Attribute_Definition: Latitude of earthquake
      Attribute_Definition_Source: NEIC
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: 0-90
          Enumerated_Domain_Value_Definition: n/a
          Enumerated_Domain_Value_Definition_Source: n/a
      Attribute_Units_of_Measure: decimal degrees
    Attribute:
      Attribute_Label: LON
      Attribute_Definition: Longitude of earthquake
      Attribute_Definition_Source: NEIC
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: -180 to 0 and 155 to 180
          Enumerated_Domain_Value_Definition: n/a
          Enumerated_Domain_Value_Definition_Source: n/a
    Attribute:
      Attribute_Label: DEPTH
      Attribute_Definition: Depth of earthquake in kilometers
      Attribute_Definition_Source: NEIC
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0
          Range_Domain_Maximum: 634
      Attribute_Units_of_Measure: Kilometers (rounded up to nearest)
    Attribute:
      Attribute_Label: MAGNITUDE
      Attribute_Definition:
        Magnitude of the earthquake.  It is a logarithmic measure of the "size" of an
        earthquake.  Commonly referred to as the "Richter scale".
      Attribute_Definition_Source: NEIC
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 4.0
          Range_Domain_Maximum: 8.10
    Attribute:
      Attribute_Label: MAG_SCALE
      Attribute_Definition: Magnitude scale
      Attribute_Definition_Source: NEIC
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value:
            Ms=Surface-wave, mb=Body-wave, Mw=Moment Magnitude, Me=Energy 
            Magnitude, ML=Local magnitude, Mn=Local or Regional magnitude, 
            MD=Duration Magnitudes, FA=Felt Area Magnitudes, UK=Unknown 
            Magnitudes
          Enumerated_Domain_Value_Definition:
            Parameters that apply to the magnitude value.  See NEIC WWW site 
            for more information: 
            http://wwwneic.cr.usgs.gov/neis/epic/code_magnitude.html
          Enumerated_Domain_Value_Definition_Source: NEIC
    Attribute:
      Attribute_Label: MAG_SOURCE
      Attribute_Definition:
        Two and three letter acronyms of the source of the magnitude data.  
        See the NEIC WWW site for more information
        (http://wwwneic.cr.usgs.gov/neis/epic/code_magnitude.html).
      Attribute_Definition_Source: NEIC
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: Various two and three letter acronyms
          Enumerated_Domain_Value_Definition: n/a
          Enumerated_Domain_Value_Definition_Source: 
            National Earthquake Information Center

  Overview_Description:
    Entity_and_Attribute_Overview:
      !The point attribute table:
      !COLUMN   ITEM NAME        WIDTH OUTPUT TYPE N.DEC
      ! 1  AREA                   4    12     F      3
      ! 5  PERIMETER              4    12     F      3
      ! 9  QUAKESX020#            4     5     B      -
      !13  QUAKESX020-ID          4     5     B      -
      !17  CATALOG_SRC            3     3     C      -
      !20  YEAR                   4     4     I      -
      !24  MONTH                  2     2     I      -
      !26  DAY                    2     2     I      -
      !28  ORIGIN_TIME            4    12     F      2
      !33  LAT                    4    12     F      2
      !36  LON                    4    12     F      2
      !40  DEPTH                  4     4     I      -
      !44  MAGNITUDE              4    12     F      2
      !48  MAG_SCALE              2     2     C      -
      !50  MAG_SOURCE             2     2     C      -

    Entity_and_Attribute_Detail_Citation: n/a

Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: Bruce Wright
        Contact_Organization: U.S. Geological Survey
      Contact_Address:
        Address_Type: mailing address
        Address: 521 National Center
        City: Reston
        State_or_Province: VA
        Postal_Code: 20192
      Contact_Voice_Telephone: 703-648-4528
      Contact_Electronic_Mail_Address: bwright@usgs.gov

  Distribution_Liability:
    Although these data have been processed successfully on a computer
    system at the U.S. Geological Survey, no warranty expressed or
    implied is made by the USGS regarding the utility of the data on
    any other system, nor shall the act of distribution constitute any
    such warranty.

Metadata_Reference_Information:
  Metadata_Date: 19980514
  Metadata_Contact:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: Bruce Wright
        Contact_Organization: U.S. Geological Survey
      Contact_Address:
        Address_Type: mailing address
        Address: 521 National Center
        City: Reston
        State_or_Province: VA
        Postal_Code: 20192
      Contact_Voice_Telephone: 703-648-4528
      Contact_Electronic_Mail_Address: bwright@usgs.gov
  Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
  Metadata_Standard_Version: 19940608
  Metadata_Security_Information:
    Metadata_Security_Classification_System: None
    Metadata_Security_Classification: Unclassified
    Metadata_Security_Handling_Description: None
