Global Geographic Information Systems

 

 

National Earthquake Information Center World Data Center for Seismology, Denver


Identification Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey (USGS)
Publication_Date: 2003
Title: Earthquakes
Publication_Information:
Publication_Place: Reston, Virginia
Publisher: U.S. Geological Survey
Description:
Abstract:
(PDE) Preliminary Determinations of Epicenters, Monthly Listing. This list is the most complete computation of hypocenters and magnitudes done by the USGS NEIC. It is normally produced a few months after the events occur. The publication is called "Preliminary" because the "final" computation of hypocenters for the world is considered to be the Bulletin of the Internation Seismological Centre (ISC), which is produced about two years after the earthquakes occur. The NEIC PDE program contributes about one-third off all data used by the ISC.
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: 2003
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Irregular
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -180.0
East_Bounding_Coordinate: 180.0
North_Bounding_Coordinate: 90.0
South_Bounding_Coordinate: -90.0
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: Trent Hare
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing address
Address: 2255 North Gemini Drive
City: Flagstaff
State_or_Province: AZ
Postal_Code: 86001
Contact_Voice_Telephone: 928-556-7126
Contact_Electronic_Mail_Address: thare@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: 2003
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: Mar 2003
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 database file. Latitude and Longitude values were written to an external file point shapefile.
Process_Date: 2003

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: 347070

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: quakes_pde1973_mar2003.dbf
Entity_Type_Definition: Point attribute table
Entity_Type_Definition_Source: ArcView 3.x
Attribute_Label: SOURCE
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: 1973-2003
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

Distribution Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Trent Hare
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing address
Address: 2255 North Gemini Drive
City: Flagstaff
State_or_Province: AZ
Postal_Code: 86001
Contact_Voice_Telephone: 928-556-7126
Contact_Electronic_Mail_Address: thare@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: 20030314
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Trent Hare
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing address
Address: 2255 North Gemini Drive
City: Flagstazz
State_or_Province: AZ
Postal_Code: 86001
Contact_Voice_Telephone: 928-556-7126
Contact_Electronic_Mail_Address: thare@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
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