earthquake

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: U. S. Geological Survey

Publication_Date: Unknown

Publication_Time: Unknown

Title: earthquake

Geospatial_Data_Presentation_Form: vector digital data

Online_Linkage:

https://pubs.usgs.gov/dds/dds-81/

Description:

Abstract:

The Long Valley caldera and the Mono-Inyo Craters volcanic chain compose a late Tertiary to Quaternary volcanic complex on the west edge of the Basin and Range Province at the base of the Sierra Nevada frontal fault escarpment.This geologically youthful volcanic system displays persistent unrest characterized by recurring earthquake swarms, inflation of the resurgent dome in the central sections of the caldera, and emissions of magmatic carbon dioxide around Mammoth Mountain. This dataset includes seismic data from 1978 to 2001.

A period of ongoing geologic unrest in the Long Valley area began in 1978, when a magnitude 5.4 earthquake struck 6 miles southeast of the caldera. This tremblor ended two decades of low quake activity in eastern California. The area has since experienced numerous swarms of earthquakes, especially in the southern part of the caldera and the adjacent Sierra Nevada.

Purpose:

To provide a portable compilation of volcanic monitoring data from the Long Valley Volcano Observatory.

Supplemental_Information:

Real-time data of the current activity of the caldera (including earthquakes, ground deformation, release of volcanic gas), information about volcanic hazards and the USGS response plan are available online at the Long Valley observatory web page (<http://lvo.wr.usgs.gov> ).

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Currentness_Reference: publication date

Status:

Progress: In work

Maintenance_and_Update_Frequency: Continually

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -119.243949

East_Bounding_Coordinate: -118.498936

North_Bounding_Coordinate: 38.246655

South_Bounding_Coordinate: 37.490781

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: Monitoring data

Theme_Keyword: Geology

Theme_Keyword: Volcano

Theme_Keyword: caldera

Theme_Keyword: Long Valley

Theme_Keyword: Mono-Inyo craters

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: United States of America

Access_Constraints: None

Use_Constraints:

None. Acknowlegdement of the U.S. Geological Survey would be appreciated in products derived from these data.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Organization: U. S. Geological Survey

Contact_Position: Scientist-in-charge

Contact_Address:

Address_Type: mailing and physical address

Address: 345 Middlefield Road, MS 910

City: Menlo Park

State_or_Province: CA

Postal_Code: 94025

Country: USA

Contact_Voice_Telephone: 650.329.4795

Contact_Facsimile_Telephone: 650.329.5203

Contact_Electronic_Mail_Address: SIC_LVO@usgs.gov

Hours_of_Service: Irregular. M-F 10 AM to 4 PM

Contact_Instructions: email is the preferred contact

Security_Information:

Security_Classification_System: None

Security_Classification: Unclassified

Security_Handling_Description: None

Native_Data_Set_Environment:

Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 3; ESRI ArcCatalog 8.2.0.700

Cross_Reference:

Citation_Information:

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report: See Entity_Attribute_Information

Quantitative_Attribute_Accuracy_Assessment:

Attribute_Accuracy_Value: See Attribute_Accuracy_Explanation

Attribute_Accuracy_Explanation:

Attribute accuracy is described, where present, with each attribute defined in the Entity and Attribute Section.

Completeness_Report:

The report is intended to describe completely the monitoring data available at the time of completion of this file.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Vertical_Positional_Accuracy:

Lineage:

Process_Step:

Process_Description: Data were imported and shape files were created.

Process_Date: Unknown

Process_Step:

Process_Description: Dataset copied.

Source_Used_Citation_Abbreviation: c:\katmai\kat-topo

Process_Step:

Process_Description: Metadata imported.

Source_Used_Citation_Abbreviation: C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\xml1B.tmp

Process_Step:

Process_Description: Dataset moved.

Source_Used_Citation_Abbreviation: C:\LVO\LVO_GISold\Monitoring_Data\Earthquakes\earthquake

Process_Step:

Process_Description: Dataset moved.

Source_Used_Citation_Abbreviation: C:\LVO\NewLVO_GIS\Monitoring_Data\Earthquakes\earthquakeCopy

Process_Step:

Process_Description: Metadata imported.

Source_Used_Citation_Abbreviation: C:\LVO\Dina\MonitoringData\EQmetadata.xml

Process_Step:

Process_Description: Metadata imported.

Source_Used_Citation_Abbreviation: C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\xml49.tmp

Spatial_Data_Organization_Information:

Indirect_Spatial_Reference: none

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: 1854

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Point

Point_and_Vector_Object_Count: 20

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: String

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator

Universal_Transverse_Mercator:

UTM_Zone_Number: 11

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.999600

Longitude_of_Central_Meridian: -117.000000

Latitude_of_Projection_Origin: 0.000000

False_Easting: 500000.000000

False_Northing: 0.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 0.000128

Ordinate_Resolution: 0.000128

Planar_Distance_Units: meters

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1927

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: earthquake

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: AREA

Attribute_Domain_Values:

Attribute:

Attribute_Label: PERIMETER

Attribute_Definition: Attribute_Definition_Source: Attribute_Domain_Values:

Attribute:

Attribute_Label: EQ_

Attribute_Definition: Attribute_Definition_Source: Attribute_Domain_Values:

Attribute:

Attribute_Label: EQ_ID

Attribute_Definition: autonumber ID

Attribute_Domain_Values:

Attribute:

Attribute_Label: DATE

Attribute_Definition:

The date when the earthquake initiates rupture, which is known as the "origin" time. Note that large earthquakes can continue rupturing for many 10's of seconds.

Attribute_Definition_Source: <http://quake.wr.usgs.gov/>

Attribute_Domain_Values:

Attribute:

Attribute_Label: TIME

Attribute_Definition:

The time when the earthquake initiates rupture, which is known as the "origin" time. Note that large earthquakes can continue rupturing for many 10's of seconds.

Attribute_Definition_Source: <http://quake.wr.usgs.gov/>

Attribute_Domain_Values:

Attribute:

Attribute_Label: LAT

Attribute_Definition:

An earthquake begins to rupture at a hypocenter which is defined by a position on the surface of the earth (epicenter) and a depth below this point (focal depth). The latitude is the number of degrees north (N) or south (S) of the equator and varies from 0 at the equator to 90 at the poles.

Attribute_Definition_Source: <http://quake.wr.usgs.gov/>

Attribute_Domain_Values:

Attribute:

Attribute_Label: LON

Attribute_Definition:

An earthquake begins to rupture at a hypocenter which is defined by a position on the surface of the earth (epicenter) and a depth below this point (focal depth). The longitude is the number of degrees east (E) or west (W) of the prime meridian which runs through Greenwich, England. The longitude varies from 0 at Greenwich to 180 and the E or W shows the direction from Greenwich.

Attribute_Definition_Source: <http://quake.wr.usgs.gov/>

Attribute_Domain_Values:

Attribute:

Attribute_Label: DEPTH

Attribute_Definition:

An earthquake begins to rupture at a hypocenter which is defined by a position on the surface of the earth (epicenter) and a depth below this point (focal depth). The depth where the earthquake begins to rupture. This depth may be relative to mean sea-level or the average elevation of the seismic stations which provided arrival-time data for the earthquake location. The choice of reference depth is dependent on the method used to locate the earthquake.

Attribute_Definition_Source: <http://quake.wr.usgs.gov/>

Attribute_Domain_Values:

Attribute:

Attribute_Label: MAG

Attribute_Definition:

Earthquake magnitude is a logarithmic measure of earthquake size. In simple terms, this means that at the same distance from the earthquake, the shaking will be 10 times as large during a magnitude 5 earthquake as during a magnitude 4 earthquake. The total amount of energy released by the earthquake, however, goes up by a factor of 32.

Attribute_Definition_Source: <http://quake.wr.usgs.gov/>

Attribute:

Attribute_Label: MAGT

Attribute_Definition:

Seismologists indicate the size of an earthquake in units of magnitude. There are many different ways that magnitude is measured from seismograms because each method only works over a limited range of magnitudes and with different types of seismometers. Some methods are based on body waves (which travel deep within the structure of the earth), some based on surface waves (which primarily travel along the uppermost layers of the earth), and some based on completely different methodologies. However, all of the methods are designed to agree well over the range of magnitudes where they are reliable.

Attribute_Definition_Source: <http://quake.wr.usgs.gov/>

Attribute:

Attribute_Label: NST

Attribute_Definition:

Number of seismic stations which reported P- and S-arrival times for this earthquake. This number may be larger than Nph if arrival times are rejected because the distance to a seismic station exceeds the maximum allowable distance or because the arrival-time observation is inconsistent with the solution.

Attribute_Definition_Source: <http://quake.wr.usgs.gov/>

Attribute:

Attribute_Label: GAP

Attribute_Definition:

The largest azimuthal gap between azimuthally adjacent stations (in degrees). In general, the smaller this number, the more reliable is the calculated horizontal position of the earthquake. Earthquake locations in which the azimuthal gap exceeds 180 degrees typically have large Erho and Erzz values.

Attribute_Definition_Source: <http://quake.wr.usgs.gov/>

Attribute:

Attribute_Label: CLO

Attribute_Definition: Distance to the closest station

Attribute_Definition_Source: author

Attribute:

Attribute_Label: RMS

Attribute_Definition:

The root-mean-square (RMS) travel time residual, in sec, using all weights. This parameter provides a measure of the fit of the observed arrival times to the predicted arrival times for this location. Smaller numbers reflect a better fit of the data. The value is dependent on the accuracy of the velocity model used to compute the earthquake location, the quality weights assigned to the arrival time data, and the procedure used to locate the earthquake.

Attribute_Definition_Source: <http://quake.wr.usgs.gov/>

Attribute:

Attribute_Label: SRC

Attribute_Definition:

The data source is the Northern California Seismic Network Catalog

Attribute_Definition_Source: author

Attribute:

Attribute_Label: EVENT_ID

Attribute_Definition:

A combination of a 2-letter Seismic Network Code and a number assigned by the contributing seismic network.

Attribute_Definition_Source: <http://quake.wr.usgs.gov/>

Attribute:

Attribute_Label: X_COORD

Attribute_Definition: Longitude in UTM

Attribute_Definition_Source: author

Attribute:

Attribute_Label: Y_COORD

Attribute_Definition: Latitude in UTM

Attribute_Definition_Source: author

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey

Contact_Person: USGS Information Services

Contact_Address:

Address_Type: mailing address

Address: Box 25286

Address: Denver Federal Center

City: Denver

State_or_Province: CO

Postal_Code: 80225-0046

Country: USA

Contact_Voice_Telephone: (303) 202-4200

Contact_Voice_Telephone: 1-888-ASK-USGS

Contact_Facsimile_Telephone: (303) 202-4695

Contact_Electronic_Mail_Address: infoservices@usgs.gov

Resource_Description: USGS Geologic Investigation Series # title (downloadable data)

Distribution_Liability:

This database, identified as DDS-#, has been approved for release and publication by the Director of the 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 United States Government may be held liable for any damages resulting from its authorized or unauthorized use.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Transfer_Size: 22.216

Fees: No fees for digital files

Metadata_Reference_Information:

Metadata_Date: 20030317

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Dina Venezky

Contact_Organization: USGS Volcano Hazards Team

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing address

Address: 345 Middlefield Road MS 910

City: Menlo Park

State_or_Province: CA

Postal_Code: 94025

Country: USA

Contact_Voice_Telephone:

REQUIRED: The telephone number by which individuals can speak to the organization or individual.

Contact_Facsimile_Telephone: 650.329.5203

Contact_Electronic_Mail_Address: SIC_LVO@usgs.gov

Contact_Instructions: email is the preferred method of contact

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time

Metadata_Security_Information:

Metadata_Security_Classification_System: None

Metadata_Security_Classification: Unclassified

Metadata_Security_Handling_Description: None

Metadata_Extensions:

Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>

Profile_Name: ESRI Metadata Profile

Metadata_Extensions:

Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>

Profile_Name: ESRI Metadata Profile

Metadata_Extensions:

Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>

Profile_Name: ESRI Metadata Profile

Metadata_Extensions:

Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>

Profile_Name: ESRI Metadata Profile