Identification_Information:
  Citation:
    Citation_Information:
      Originator: Ray W. Sliter
      Originator: William R. Normark
      Originator: Christina E. Gutmacher
      Publication_Date: 2005
      Title:
        Multichannel seismic-reflection data acquired off the coast of southern California -
        Part A 1997, 1998, 1999, and 2000
      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 2005-1084
      Publication_Information:
        Publication_Place: Menlo Park, California
        Publisher: United States Geological Survey
      Online_Linkage: <http://pubs.usgs.gov/of/2005/1084/>
  Description:
    Abstract:
      Multichannel seismic-reflection (MCS) data were collected in the California Continental
      Borderland as part of southern California Earthquake Hazards Task. Five data acquisition
      cruises conducted over a six-year span collected MCS data from offshore Santa Barbara,
      California south to the Exclusive Economic Zone boundary with Mexico. The primary mission
      was to map late Quaternary deformation as well as identify and characterize fault zones that
      have potential to impact high population areas of southern California. To meet its objectives,
      the project work focused on the distribution, character, and relative intensity of active
      (i.e., Holocene) deformation along the continental shelf and basins adjacent to the most highly
      populated areas. In addition, the project examined the Pliocene-Pleistocene record of how
      deformation shifted in space and time to help identify actively deforming structures that
      may constitute current significant seismic hazards.

      The MCS data accessible through this report cover the first four years of survey activity and
      include data from offshore Malibu coastal area west of Santa Monica, California to the southern
      survey limit offshore San Diego. The MCS data, which were collected with a 250-m-long, 24-channel
      streamer used a small gas-injector airgun source. This system provided optimum resolution of
      the upper 1 to 2 km of sediment for mapping active fault systems. The 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 these USGS Coastal and Marine Geology field activities is available
      online at
      <http://walrus.wr.usgs.gov/infobank/s/s197sc/html/s-1-97-sc.meta.html>,
      <http://walrus.wr.usgs.gov/infobank/a/a198sc/html/a-1-98-sc.meta.html>,
      <http://walrus.wr.usgs.gov/infobank/o/o199sc/html/o-1-99-sc.meta.html>, and
      <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: 19970801
        Ending_Date: 20001001
    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: +34.16667
      South_Bounding_Coordinate: +32.50000
  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: NASA/Global Change Master Directory (GCMD) Earth Science Keywords Version 4.2.2
      Theme_Keyword: Parameters Keywords > OCEANS > MARINE SEDIMENTS > STRATIGRAPHIC SEQUENCE
      Theme_Keyword: Parameters Keywords > SOLID EARTH > ROCKS/MINERALS > SEDIMENTS
      Theme_Keyword: Parameters Keywords > SOLID EARTH > SEISMOLOGY > SEISMIC PROFILE
      Theme_Keyword: Platform Keywords > SHIPS
      Theme_Keyword: Instrument Keywords > AIRGUN ARRAYS
      Theme_Keyword: Instrument Keywords > GEOPHONES
      Theme_Keyword: Instrument Keywords > HYDROPHONES
      Theme_Keyword: Instrument Keywords > SEISMIC REFLECTION PROFILERS
    Theme:
      Theme_Keyword_Thesaurus: None
      Theme_Keyword: active fault
      Theme_Keyword: airgun
      Theme_Keyword: deformation
      Theme_Keyword: digital data
      Theme_Keyword: earthquake hazards
      Theme_Keyword: fault zone
      Theme_Keyword: marine geology
      Theme_Keyword: multichannel
      Theme_Keyword: profile
      Theme_Keyword: sediment deformation
      Theme_Keyword: seismic data
      Theme_Keyword: seismic reflection
      Theme_Keyword: tsunami
    Place:
      Place_Keyword_Thesaurus: NASA/Global Change Master Directory (GCMD) Earth Science Keywords Version 4.2.2
      Place_Keyword: Location Keywords > PACIFIC OCEAN
    Place:
      Place_Keyword_Thesaurus: Geographic Names Information System (GNIS), USGS, Reston, VA
      Place_Keyword: Pacific Ocean
    Place:
      Place_Keyword_Thesaurus: None
      Place_Keyword: California
      Place_Keyword: Continental Borderland
      Place_Keyword: Dana Point
      Place_Keyword: Los Angeles
      Place_Keyword: Point Dume
      Place_Keyword: San Diego
      Place_Keyword: Santa Monica Bay
      Place_Keyword: Southern California
      Place_Keyword: USA
    Temporal:
      Temporal_Keyword_Thesaurus: None
      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/2005/1084/images/ge-overview.png>
    Browse_Graphic_File_Description: Index map of area covered in this report.
    Browse_Graphic_File_Type: PNG
  Browse_Graphic:
    Browse_Graphic_File_Name: <http://pubs.usgs.gov/of/2005/1084/maps/o199/lines/221.html>
    Browse_Graphic_File_Description: Example of Multichannel seismic data accessible via this report.
    Browse_Graphic_File_Type: JPEG
  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 MCS
    data collected on the referenced cruises have been included in this report, with the
    exception of those collected in Los Angeles Harbor and shelf, for an aquifer study, on
    A-1-00-SC. Some seismic profiles have gaps in them due to system crashes or intentional
    shutdowns as required, under terms of our operating permit, to protect marine mammals.
  Positional_Accuracy:
    Horizontal_Positional_Accuracy:
      Horizontal_Positional_Accuracy_Report:
        Tracklines shown are for the GPS antenna on the ships
        collecting the multichannel seismic data.  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 40 meters.
    Vertical_Positional_Accuracy:
      Vertical_Positional_Accuracy_Report:
        Depths shown in the seismic data files are in
        milliseconds (round trip travel time) and are referenced to sea level.
  Lineage:
    Process_Step:
      Process_Description:
        Refer to report sections "Cruise history", "Data acquisition methods", and "Data processing"
        for details of geophysical data acquisition and processing sequence used for MCS 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 sub-maps.
        Broke area into four sections for better viewing.  Converted
        plots to TIFF and JPEG files for zooming in on sections. Ray W. Sliter
      Process_Date: 2004
    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: 34.16667 N to 32.50 N, 119.0 W to 117.0 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: 2004
    Process_Step:
      Process_Description:
        Plotted tracklines of seismic reflection profiles using GMT <http://gmt.soest.hawaii.edu/> to create maps.
        Created HTML image maps to allow mouse-over of trackline details
        and links to profile displays. Peter Triezenberg
      Process_Date: 2005
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: 0.9996
            Longitude_of_Central_Meridian: -117.0
            Latitude_of_Projection_Origin: 0.0
            False_Easting: 500000
            False_Northing: 0
      Planar_Coordinate_Information:
        Planar_Coordinate_Encoding_Method: coordinate pair
        Coordinate_Representation:
          Abscissa_Resolution: 25
          Ordinate_Resolution: 25
        Planar_Distance_Units: Meters
    Geodetic_Model:
      Horizontal_Datum_Name: North American Datum of 1983
      Ellipsoid_Name: GRS1980
      Semi-major_Axis: 6378206.4
      Denominator_of_Flattening_Ratio: 294.98
Entity_and_Attribute_Information:
  Overview_Description:
    Entity_and_Attribute_Overview:
      Locations of data profiles are shown as color-coded map images
      at an unspecified projection and scale.  These HTML image maps
      allow mouse over trackline details and links to profile displays.
      The images of the reflection profiles are rendered in TIFF and JPEG
      image formats. Links are provided to the SEG-Y digital data for each line.
    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 2005-1084
    This report is distributed on-line only. Access it at <http://pubs.usgs.gov/of/2005/1084/>.
  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/2005/1084/>
    Fees: None
    Ordering_Instructions: Choose and download data via <http://pubs.usgs.gov/of/2005/1084/>.
Metadata_Reference_Information:
  Metadata_Date: 20050316
  Metadata_Contact:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: Christina E. Gutmacher
        Contact_Organization:
          United States Geological Survey (USGS)
          Coastal and Marine Geology (CMG)
      Contact_Position: Geologist
      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) 329-5309
      Contact_Electronic_Mail_Address: cgutmacher@usgs.gov
  Metadata_Standard_Name:
    Content Standard for Digital Geospatial Metadata
    ("CSDGM version 2")
  Metadata_Standard_Version: FGDC-STD-001-1998