Metadata also available as - [Questions & Answers] - [Parseable text] - [XML]

Metadata:

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

---

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

---

Generated by mp version 2.8.11 on Wed Mar 16 13:51:36 2005