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.jpg>
    Browse_Graphic_File_Description: Static index map of tracklines covered in this report.
    Browse_Graphic_File_Type: JPEG
  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