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High-resolution boomer seismic-reflection profiles of the shelf off southern California from cruise A-1-00-SC: Santa Monica Bay to San Diego

Metadata

Metadata:

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

Identification_Information:

Citation:

Citation_Information:

Originator: Christina E. Gutmacher

Originator: Stephanie L. Ross

Originator: Peter Triezenberg

Originator: Ray W. Sliter

Originator: William R. Normark

Originator: Brian D. Edwards

Publication_Date: 2006

Title:

High-resolution boomer seismic-reflection profiles of the shelf off southern California: Santa Monica Bay to San Diego

Edition: Version 1.0

Geospatial_Data_Presentation_Form:

Text report containing graphical map images and geophysical data images (no spatial referencing).

Series_Information:

Series_Name: USGS Open-File Report

Issue_Identification: USGS OFR 2006-1373

Publication_Information:

Publication_Place: Menlo Park, California

Publisher: United States Geological Survey

Online_Linkage: <http://pubs.usgs.gov/of/2006/1373/>

Description:

Abstract:

High-resolution boomer data were collected in the California Continental Borderland as part of the southern California Earthquake Hazards Task of the Southern California Coastal and Marine Geology Regional Investigations Project. During the period from 1997 to 2002, five data-acquisition cruises collected seismic-reflection data using several different systems from offshore Santa Barbara, California, south to the Exclusive Economic Zone boundary with Mexico. A key mission of this project was to map late Quaternary deformation in addition to improving our understanding of which offshore fault zones might have potential to damage highly populated areas of southern California. State regulations concerning the use of seismic-reflection equipment within three miles of the coastline precluded the routine gathering of high-resolution multichannel data in that swath adjacent to the coast. Boomer seismic-reflection data, however, can be obtained within the State 3-mile limit provided the operation receives authorization from the California State Lands Commission.

The Geopulse boomer data accessible through this report were collected on the cruise A-1-00-SC, which was the only survey where we requested permission to work inside the 3-mile limit of the State of California. These data are critical to the job of connecting onshore and offshore faults, the overall lengths of which are related to the potential size of an earthquake that might be generated along them. The 2000 survey was designed to fill the gap between the coast and reflection data obtained in deeper water on previous cruises as well as data anticipated from future surveys. This report includes trackline maps showing the location of the data, as well as both digital data files (SEG-Y) and images of all of the profiles.

Purpose:

These MCS data were collected as part of a project to identify the active fault systems in the southern California coastal zone, including the continental shelf and adjacent deep basins, that pose the greatest potential seismic hazards for the most populated urban corridor along the U.S. Pacific margin. See <http://walrus.wr.usgs.gov/cabrillo/tierra/index.html> for more information. This report is prepared to make these data available to science researchers, students, and other interested parties. Supplemental_Information: Additional information for this USGS Coastal and Marine Geology field activity is available online at <http://walrus.wr.usgs.gov/infobank/a/a100sc/html/a-1-00-sc.meta.html>.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20000605

Ending_Date: 20000629

Currentness_Reference: Time span of data collection and initial archiving.

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -119.00000

East_Bounding_Coordinate: -117.00000

North_Bounding_Coordinate: +34.50000

South_Bounding_Coordinate: +32.50000

Keywords:

Theme:

Theme_Keyword_Thesaurus: General

Theme_Keyword: active fault

Theme_Keyword: boomer

Theme_Keyword: California Coastal Commission

Theme_Keyword: California State Lands Commission

Theme_Keyword: deformation

Theme_Keyword: digital data

Theme_Keyword: earthquake hazards

Theme_Keyword: fault zone

Theme_Keyword: Incidental Harassment Authorization

Theme_Keyword: marine geology

Theme_Keyword: Marine Mammal Protection Act

Theme_Keyword: profile

Theme_Keyword: sediment deformation

Theme_Keyword: seismic data

Theme_Keyword: seismic reflection

Theme_Keyword: single channel

Theme:

Theme_Keyword_Thesaurus:

NASA/Global Change Master Directory (GCMD) Earth Science Keywords Version 5.3.3

Theme_Keyword: OCEANS > MARINE SEDIMENTS > STRATIGRAPHIC SEQUENCE

Theme_Keyword: SOLID EARTH > ROCKS/MINERALS > SEDIMENTS

Theme_Keyword: SOLID EARTH > SEISMOLOGY > SEISMIC PROFILE

Theme_Keyword: Instruments > SEISMIC SENSORS > SEISMIC REFLECTION PROFILERS

Theme_Keyword: Instruments > SONAR/ACOUSTIC SENSORS > GEOPHONES

Theme_Keyword: Instruments > SONAR/ACOUSTIC SENSORS > HYDROPHONES

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category

Theme_Keyword: environment

Theme_Keyword: geoscientificinformation

Theme_Keyword: imageryBaseMapsEarthCover

Theme_Keyword: oceans

Place:

Place_Keyword_Thesaurus: General

Place_Keyword: California

Place_Keyword: Continental Borderland

Place_Keyword: Redondo Beach

Place_Keyword: Los Angeles

Place_Keyword: Point Dume

Place_Keyword: Santa Monica Bay

Place_Keyword: Southern California

Place_Keyword: USA

Place:

Place_Keyword_Thesaurus: Geographic Names Information System (GNIS), USGS, Reston, VA

Place_Keyword: Pacific Ocean

Temporal:

Temporal_Keyword_Thesaurus: General

Temporal_Keyword: Holocene

Temporal_Keyword: Quaternary

Access_Constraints: None

Use_Constraints:

These data are not intended for navigational purposes. Please recognize the U.S. Geological Survey (USGS) as the source of this information.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Ray W. Sliter

Contact_Organization:

United States Geological Survey (USGS) Coastal and Marine Geology (CMG)

Contact_Position: Geophysicist

Contact_Address:

Address_Type: mailing and physical address

Address: USGS, Mail Stop 999, 345 Middlefield Road

City: Menlo Park

State_or_Province: CA

Postal_Code: 94025-3561

Country: USA

Contact_Voice_Telephone: (650) 329-5194

Contact_Electronic_Mail_Address: rsliter@usgs.gov

Browse_Graphic:

Browse_Graphic_File_Name: <http://pubs.usgs.gov/of/2006/1373/images/A-1-00-SC.kmz>

Browse_Graphic_File_Description: Interactive index map of tracklines covered in this report.

Browse_Graphic_File_Type: Google Earth Keyhole Markup Language (KML) file

Browse_Graphic:

Browse_Graphic_File_Name: <http://pubs.usgs.gov/of/2006/1373/images/A-1-00-SC.pdf>

Browse_Graphic_File_Description: Static index map of tracklines covered in this report.

Browse_Graphic_File_Type: PDF

Browse_Graphic:

Browse_Graphic_File_Name: <http://pubs.usgs.gov/of/2006/1373/jpg/delph/a1g0h802.jpg>

Browse_Graphic_File_Description: Example of Geopulse seismic data accessible via this report.

Browse_Graphic_File_Type: JPEG

Browse_Graphic:

Browse_Graphic_File_Name: <http://pubs.usgs.gov/of/2006/1373/pdf/delph/a1g0h802.pdf>

Browse_Graphic_File_Description: Example of Geopulse seismic data accessible via this report.

Browse_Graphic_File_Type: PDF

Data_Set_Credit:

Peter Triezenberg produced the interactive web pages for this report.

Native_Data_Set_Environment: SEG-Y

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report: Data have not been independently verified.

Logical_Consistency_Report: Undetermined.

Completeness_Report:

Reference the full report for a description of data coverage. All single-channel Geopulse data collected on the referenced cruise have been included in this report. Some seismic profiles have gaps in them due to system crashes or hardware maintenance.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Shot point numbers in the data files correspond to those in the navigation files. The horizontal positional accuracy of the seismic data thus linked to ship's position is estimated to be within 30 meters.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Depths shown in the seismic data files are in seconds (round trip travel time) and are referenced to sea level.

Lineage:

Process_Step:

Process_Description:

Refer to report sections "Data acquisition method" and "Data processing" for details of Geopulse boomer data acquisition and processing sequence used for data in this report. Ray W. Sliter

Process_Date: 2003

Process_Step:

Process_Description:

Plotted shot-point map of cruises using GMT <http://gmt.soest.hawaii.edu/> to create static map. Converted plots to PDF and JPEG files to provide format options for downloading data. Ray W. Sliter

Process_Date: 2003

Process_Step:

Process_Description:

Used GEODAS (GEOphysical DAta System) to create a custom bathymetric and topographic grid for the southern California region covered by the cruise index map. The website is: <http://www.ngdc.noaa.gov/mgg/geodas/geodas.html>. The parameters used are as follows: Grid database: US Coastal Relief Model Grids Lat/Lon Area Bounds: 34.50000 N to 32.50000 N, 119.00000 W to 117.00000 W Grid Cell Size: 3 seconds Grid Cell Value Parameters: 4-byte integers, 10ths of meters Grid Format: xyz (lon, lat, depth) format, no header, space-delimited, exclude empty cells. Peter Triezenberg

Process_Date: 2006

Process_Step:

Process_Description:

Plotted tracklines of seismic reflection profiles using GMT <http://gmt.soest.hawaii.edu/> to create static map. Plotted tracklines of seismic reflection profiles using a Keyhole Markup Language (KML) file in Google Earth. Peter Triezenberg

Process_Date: 2006

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: other grid system

Other_Grid_System's_Definition:

Cylindrical equidistant with central meridian -118.0 degrees longitude

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 3

Ordinate_Resolution: 3

Planar_Distance_Units: seconds

Geodetic_Model:

Horizontal_Datum_Name: World Geodetic System 1984

Ellipsoid_Name: WGS 84

Semi-major_Axis: 6378137

Denominator_of_Flattening_Ratio: 298.257

Entity_and_Attribute_Information:

Overview_Description:

Entity_and_Attribute_Overview:

Locations of data profiles are shown as a line segment in Google Earth. Click on the start of the trackline to open a pop-up window and view details of the trackline, download data and view a preview of the reflection profile. The full-size JPEG reflection profile can be viewed and the JPEG, PDF, and SEG-Y digital data can be downloaded from this pop-up window. Alternatively, the user can note a trackline number on the static map, then find the number in the data table, and view and/or download the data from the table.

Entity_and_Attribute_Detail_Citation: none

Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Ray W. Sliter

Contact_Organization:

United States Geological Survey (USGS) Coastal and Marine Geology (CMG)

Contact_Address:

Address_Type: mailing and physical address

Address: USGS, Mail Stop 999, 345 Middlefield Road

City: Menlo Park

State_or_Province: CA

Postal_Code: 94025-3561

Country: USA

Contact_Voice_Telephone: (650) 329-5194

Contact_Electronic_Mail_Address: rsliter@usgs.gov

Resource_Description:

United States Geological Survey Open-File Report 2006-1373 This report is distributed on-line only. Access it at <http://pubs.usgs.gov/of/2006/1373/>.

Distribution_Liability:

Please recognize the U.S. Geological Survey (USGS) as the source of this information.

Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, these data and information are provided with the understanding that they are not guaranteed to be usable, timely, accurate, or complete. Users are cautioned to consider carefully the provisional nature of these data and information before using them for decisions that concern personal or public safety or the conduct of business that involves substantial monetary or operational consequences. Conclusions drawn from, or actions undertaken on the basis of, such data and information are the sole responsibility of the user.

Neither the U.S. Government nor any agency thereof, nor any of their employees, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any data, software, information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights.

Trade, firm, or product names and other references to commercial products and services are provided for information only and do not constitute endorsement or warranty, express or implied, by the USGS, USDOI, or U.S. Government, as to their suitability, content, usefulness, functioning, completeness, or accuracy.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: TIFF, JPEG, SEG-Y, ASCII

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: <http://pubs.usgs.gov/of/2006/1373/>

Fees: None

Ordering_Instructions:

Choose and download data via <http://pubs.usgs.gov/of/2006/1373/>.

Metadata_Reference_Information:

Metadata_Date: 20060629

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Ray W. Sliter

Contact_Organization:

United States Geological Survey (USGS) Coastal and Marine Geology (CMG)

Contact_Position: Geophysicist

Contact_Address:

Address_Type: mailing and physical address

Address: USGS, Mail Stop 999, 345 Middlefield Road

City: Menlo Park

State_or_Province: CA

Postal_Code: 94025-3561

Country: USA

Contact_Voice_Telephone: (650) 329-5194

Contact_Electronic_Mail_Address: rsliter@usgs.gov

Metadata_Standard_Name:

Content Standard for Digital Geospatial Metadata ("CSDGM version 2")

Metadata_Standard_Version: FGDC-STD-001-1998