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Ground Magnetic Data from within the Long Valley Caldera, California

Federal Geographic Data Committee (FGDC) Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: E. D. Anderson and C. A. Finn
Publication_Date: 2004
Title: Ground Magnetic Data from within the Long Valley Caldera, California
Edition:
Geospatial_Data_Presentation_Form: online files
Series_Information:
Series_Name: Open File Report 2004
Issue_Identification:
Publication_Information:
Publication_Place:
Publisher: U.S. Geological Survey
Other_Citation_Details:
Online_Linkage: http://pubs.usgs.gov/of/2004/1096/
Description:
Abstract:
The past two decades have been a period of unrest for the Long Valley caldera of eastern California. The unrest began in 1978 and continued through late 1999 and included recurring swarms of moderate earthquakes, as well as uplifting of the Resurgent Dome, which has totaled approximately 80 cm. It is believed that the seismicity is accompanied by magmatic intrusion beneath both the Resurgent Dome at a depth of about 7 km; 10 km and the South Moat Seismic Zone (SMSZ) at a depth of about 15 km (Sorey and others, 2003). Seismic surveys within the caldera's topographic boundary have indicated the seismicity beneath the northwest section of the caldera is associated with fluid injection into narrow conduits and fractures (Stroujkova and Malin, 2000). Like the dominant regional structural trend, these conduits run in a northwest-southeast direction and are only expressed at the surface by a slight topographic relief of about 3 m. Merged aeromagnetic data (Roberts and Jachens, 1999) over the caldera show a magnetic low in the west and a high in the east (Figure 3). The western part has been modeled to relate to altered, low-magnetization (about 2.5 km thick) Bishop Tuff beneath the Resurgent Dome, indicating hydrothermal alteration in the west, whereas the high in the east represents the unaltered Bishop Tuff (Williams and others, 1977). The ground magnetic survey was conducted to locate magnetic lows that might indicate altered zones reflecting conduits for hydrothermal fluid flow in the northwest portion of the caldera. [Summary provided by the USGS.]
Purpose:
Not Available
Supplemental_Information:
REFERENCE: Roberts, C. W. and Jachens, R. C., 1999, Preliminary aeromagnetic anomaly map of California: U.S. Geological Survey Open-File Report 99-440, scale 1:250,000. Sorey, M. L., McConnell, V. S., and Roeloffs, E., 2003, Summary of recent research in Long Valley Caldera, California: Journal of Volcanology and Geothermal Research, v. 127 pp. 165-173.
Supplemental_Information:
REFERENCE: Stroujkova, A. F and Malin, P. E., 2000, A magma mass beneath Casa Diable? Further evidence from reflected seismic waves: Bulletin of the Seismological Society of America, v. 90, no. 2 pp. 500-511.
Supplemental_Information:
REFERENCE: Willams, D. L., Berkman, F., and Mankinen, E. A., 1977, Implications of a magnetic model of the Long Valley Caldera, California: Journal of Geophysical Research, v. 82, no. 20, pp. 3030-3038.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20030727
Ending_Date: 20030801
Currentness_Reference:Unknown
Status:
Progress: In Work
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: -124.9
East_Bounding_Coordinate: -113.61
North_Bounding_Coordinate: 42.51
South_Bounding_Coordinate: 32.02
Keywords:
Theme:
Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS
Theme_Keyword_Thesaurus: GCMD PLATFORM
Theme_Keyword_Thesaurus: GCMD INSTRUMENT
Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS
Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY
Theme_Keyword_Thesaurus: DATA SET LANGUAGE
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > GEOMAGNETISM > MAGNETIC FIELD > MAGNETIC ANOMALIES
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > GEOMAGNETISM > MAGNETIC FIELD
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > GEOMAGNETISM > MAGNETIC FIELD > MAGNETIC INTENSITY
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > TECTONICS > EARTHQUAKES > EARTHQUAKE MAGNITUDE/INTENSITY
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > TECTONICS > EARTHQUAKES > EARTHQUAKE OCCURRENCES
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > TECTONICS > EARTHQUAKES > EARTHQUAKE PREDICTIONS
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > TECTONICS > PLATE TECTONICS
Theme_Keyword: FIELD SURVEYS
Theme_Keyword: MAPS
Theme_Keyword: MAGNETOMETERS
Theme_Keyword: GPS > GLOBAL POSITIONING SYSTEM
Theme_Keyword: Ofr
Theme_Keyword: Open File Report
Theme_Keyword: Caldera
Theme_Keyword: Ground Magnetics
Theme_Keyword: Seismic Surveys
Theme_Keyword: Tectonics
Theme_Keyword: GEOSCIENTIFIC INFORMATION
Theme_Keyword: ENGLISH
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > CALIFORNIA
Access_Constraints: Not Available
Use_Constraints:
Not Available
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: CAROL A FINN
Contact_Person_Primary:
Contact_Person: ERIC D. ANDERSON
Contact_Position: TECHNICAL CONTACT
Contact_Position: TECHNICAL CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: U.S. Geological Survey
Address: MS 964
Address: Denver Federal Center
City: Denver
State_or_Province: CO
Postal_Code: 80225
Country: USA
Contact_Address:
Address_Type: Mailing and Physical Address
Address: U.S. Geological Survey, Geology Division
Address: Box 25046, MS 964
Address: Denver Federal Center
City: Denver
State_or_Province: CO
Postal_Code: 80225-0046
Country: USA
Contact_Voice_Telephone: 303-236-1345
Contact_Voice_Telephone: 303-236-5652
Contact_Facsimile_Telephone: 303-236-1229
Contact_Electronic_Mail_Address: cfinn@usgs.gov
Contact_Electronic_Mail_Address: ericanderson@usgs.gov
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Not Available
Logical_Consistency_Report:
Not Available
Completeness_Report:
Not Available
Lineage:
Process_Step:
Process_Description:
Not Available
Process_Date: Unknown
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Spatial_Reference_Information:
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: DOI/USGS/GD/PUBS/WR/GEOPUBS > Publications-Western Region,Geological Division, U.S. Geological Survey, U.S. Department of the Interior
Contact_Person: CAROLYN A. DONLIN
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: U.S. Geological Survey
Address: Geology Division
Address: 345 Middlefield Road
City: Menlo Park
State_or_Province: California
Postal_Code: 94025
Country: USA
Contact_Voice_Telephone: 650-329-5015
Contact_Facsimile_Telephone: 650-329-5119
Contact_Electronic_Mail_Address: cdonlin@usgs.gov
Resource_Description: USGS_OFR_2004_1096
Distribution_Liability:
Not Available
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ASCII
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://geopubs.wr.usgs.gov/
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://pubs.usgs.gov/of/2004/1096/downloads/
Access_Instructions:
Download Long Valley ground magnetic data.
Fees: No Fees
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Metadata_Reference_Information:
Metadata_Date: 20060117
Metadata_Review_Date: 20160127
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: GCMD User Support Office
Contact_Organization: NASA Global Change Master Directory
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Not Available
City: Lanham
State_or_Province: MD
Postal_Code: 20706
Country: USA
Contact_Voice_Telephone: Not Available
Contact_Electronic_Mail_Address: gcmduso@gcmd.gsfc.nasa.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
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