Probabilistic earthquake relocation in three-dimensional velocity models for the Yellowstone National Park region, Wyoming

Metadata also available as

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Stephan Husen
Originator: Robert B. Smith
Publication_Date: 2004
Title:
Probabilistic earthquake relocation in three-dimensional velocity models for the Yellowstone National Park region, Wyoming
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: Bulletin of the Seismological Society of America
Issue_Identification: v94, p. 880-896
Online_Linkage:
\\YELLOWSTONEGIS\C$\thesis\gis\data\ynp\catalog\1972-2003\Yell_cat_7203_geo.shp
Description:
Abstract:
Recorded seismicity for the Yellowstone National Park region, comprising 25,267 earthquakes from November 1972 to December 2002, has been relocated using three-dimensional velocity models and probabilistic earthquake location. In addition, new coda magnitudes for earthquakes between 1984 and 2002 were computed by using an improved coda magnitude equation. Three-dimensional velocity models for earthquake location were computed by inverting subsets of high quality data of three different periods, 1973-1981, 1984-1994, and 1995-2002, for hypocenter locations and seismic velocities. Earthquakes were relocated by using a nonlinear, probabilistic solution to the earthquake location problem. Fully nonlinear location uncertainties included in the probabilistic solution allow a better and more reliable classification of earthquake locations into four quality classes. Earthquake locations show an improvement in location accuracy with time, which we attribute to improved network geometry and more precise timing of arrival times. No large systematic shifts of the relocated earthquake locations are observed, except a systematic shift of _2 km to greater depth. The new relocated earthquake locations show tighter clustering of epicenters and focal depths when compared with original earthquake locations. The most intense seismicity in terms of number of earthquakes and cumulative seismic moment release in the Yellowstone National Park region occurs northwest of the Yellowstone caldera between Hebgen Lake and the northern rim of the caldera. Seismicity within the Yellowstone caldera is diffuse, and shallow individual clusters of earthquakes can be associated with major hydrothermal areas.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: unknown
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -112.063300
East_Bounding_Coordinate: -109.741300
North_Bounding_Coordinate: 45.390300
South_Bounding_Coordinate: 43.538900
Keywords:
Theme:
Theme_Keyword_Thesaurus: Earthquakes
Theme_Keyword: Earthquakes
Theme_Keyword: Seismicity
Theme_Keyword: Earthquake Relocation
Place:
Place_Keyword: Yellowstone
Access_Constraints: none
Use_Constraints: none
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Stephan Husen
Contact_Organization: Swiss Seismological Service
Contact_Position: Seismologist
Contact_Address:
Address_Type: mailing address
Address: Swiss Seismological Service
Address: ETH Hoenggerberg
Address: CH 8093 Zurich, Switzerland
City: Zurich
Postal_Code: CH 8093
Country: Switzerland
Contact_Voice_Telephone: +41-1-6332623
Contact_Facsimile_Telephone: +41-1-6331065
Contact_Electronic_Mail_Address: stephan@tomo.ig.erdw.ethz.ch
Browse_Graphic:
Browse_Graphic_File_Name:
<http://www.yellowstonegis.utah.edu/data/seismicity3d/Yell_Seis.jpg>
Browse_Graphic_File_Description: Yellowstone Seismicity from 1972-2003
Browse_Graphic_File_Type: JPEG
Native_Data_Set_Environment:
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Data_Quality_Information:
Lineage:
Process_Step:
Process_Description: Dataset copied.

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Entity point
Point_and_Vector_Object_Count: 26019

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.000000
Longitude_Resolution: 0.000000
Geographic_Coordinate_Units: Decimal degrees
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222

Entity_and_Attribute_Information:
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Entity_Type_Label: Yell_cat_7203_geo
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Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
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Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
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Attribute:
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Attribute_Label: len2
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Attribute_Label: len3
Attribute:
Attribute_Label: qual

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Resource_Description: Downloadable Data
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Metadata_Reference_Information:
Metadata_Date: 20051111
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Jamie Farrell
Contact_Organization: University of Utah
Contact_Position: Graduate Student
Contact_Address:
Address_Type: mailing and physical address
Address: University of Utah
Address: Dept. of Geology & Geophysics
Address: 135 S. 1460 E.
Address: Room 706
City: Salt Lake City
State_or_Province: Utah
Postal_Code: 84112-0111
Country: USA
Contact_Voice_Telephone: 801-581-7856
Contact_Facsimile_Telephone: 801-581- 7065
Contact_Electronic_Mail_Address: farrell@earth.utah.edu
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Extensions:
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Profile_Name: ESRI Metadata Profile

Generated by mp version 2.8.6 on Fri Nov 11 15:01:03 2005