Identification_Information: Citation: Citation_Information: Originator: William R. Normark Originator: David J.W. Piper Originator: Ray W. Sliter Originator: Peter Triezenberg Originator: Christina E. Gutmacher Publication_Date: 2006 Title: Digital single-channel seismic-reflection data from Western Santa Monica Basin 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 2006-1180 Publication_Information: Publication_Place: Menlo Park, California Publisher: United States Geological Survey Online_Linkage: Description: Abstract: During a collaborative project in 1992, a Canadian Geological Survey cruise obtained about 850 line-km of high-quality boomer and sleeve-gun reflection profiles across Hueneme, Mugu and Dume submarine fans, Santa Monica Basin, off southern California. The goals of this work were to better understand the processes that lead to the formation of sandy submarine fans and the role of sea-level changes in controlling fan development. This report includes a trackline map of the area surveyed, as well as images of the sleeve-gun profiles and the opportunity to download both images and digital data files (SEG-Y) of all the profiles. Purpose: These sleeve-gun data were collected as part of a project investigating deep-sea fans. They have subsequently become useful to a current project working 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 . Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19920130 Ending_Date: 19920204 Currentness_Reference: Time span of data collection (GSC). Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -119.50000 East_Bounding_Coordinate: -118.50000 North_Bounding_Coordinate: +34.16667 South_Bounding_Coordinate: +33.50000 Keywords: Theme: Theme_Keyword_Thesaurus: General Theme_Keyword: active fault Theme_Keyword: sleeve gun Theme_Keyword: deformation Theme_Keyword: digital data Theme_Keyword: earthquake hazards Theme_Keyword: fault zone Theme_Keyword: marine geology Theme_Keyword: single channel Theme_Keyword: profile Theme_Keyword: sediment deformation Theme_Keyword: seismic data Theme_Keyword: seismic reflection 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 > AIRGUN ARRAYS 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: 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: Browse_Graphic_File_Description: Index map of tracklines covered in this report. Browse_Graphic_File_Type: SVG Browse_Graphic: Browse_Graphic_File_Name: Browse_Graphic_File_Description: Example of sleeve-gun 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 sleeve-gun 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. See Appendix for details of navigational system used. 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 "Data acquisition method" and "Data processing" for details of geophysical data acquisition and processing sequence used for data in this report. Ray W. Sliter Process_Date: 2004 Process_Step: Process_Description: Plotted shot point map of cruises using GMT to create sub-maps. Converted plots to TIFF and JPEG files to provide format options for downloading data. Ray W. Sliter Process_Date: 2005 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: . The parameters used are as follows: Grid database: US Coastal Relief Model Grids Lat/Lon Area Bounds: 34.16667 N to 33.50000 N, 119.50000 W to 118.50000 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 maps. Created Scalable Vector Graphics (SVG) map to allow mouse-over of trackline details and links to profile displays. Peter Triezenberg Process_Date: 2006 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 a map image at an unspecified projection and scale. This Scalable Vector Graphics (SVG) map allows 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 2006-1180 This report is distributed on-line only. Access it at . 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: Fees: None Ordering_Instructions: Choose and download data via . Metadata_Reference_Information: Metadata_Date: 20060626 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