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Metadata
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ID
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M-1-97-SF
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Also Known As
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BASIX_III
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Abstract
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Chief Scientists: Pat Hart, Jon Childs. Deep-Crustal
Seismic data (seismograph, YoNav, GPS) of field activity
M-1-97-SF in San Francisco Bay from 08/31/1997 to 09/15/1997
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Project/Theme
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Bay Area Seismic Imaging Experiment (BASIX)
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Chief Scientist
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Pat Hart
Jon Childs
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Activity Type
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Deep-Crustal Seismic
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Platform
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William A. McGaw
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Area of Operation
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San Francisco Bay, San Francisco Bay, CA
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Location map
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Bounding Coordinates
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38.07104
-122.44003 -122.09148
37.57696
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Ports
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leave Redwood City, CA
arrive Redwood City, CA
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Dates
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08/31/1997 (JD 243) to 09/15/1997 (JD 258)
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Analog Materials
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list
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Index maps
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Information Specialist
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Crew
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Pat Hart
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Chief Scientist , USGS Western Region
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Jon Childs
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Chief Scientist, USGS Western Region
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Ray Sliter
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Geophysicist, USGS Western Region
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Tom Parsons
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Geophysicist, USGS Western Region
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Walt Olson
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Mechanical Technician, USGS Western Region
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Kevin O'Toole
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Mechanical Technician, USGS Western Region
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Hal Williams
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Mechanical Technician, USGS Western
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Jon Childs
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Chief Scientist, Region USGS Western Region
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Dave Hogg
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Electrical Technician, USGS Western Region
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Bill Robinson
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Electrical Engineer, USGS Western Region
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Jeff Brody
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Computer Specialist, USGS Western Region
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Dennis Mann
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Data Curator, USGS Western Region
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Steve Wessels
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Photographer, USGS Western Region
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Bill Cooperwat
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Geologist, Stanford
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Diane Minasian
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Geologist, USGS Western Region
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Terence Shinn
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Ship Captain
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Dave
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Chief Engineer
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Steve Bean
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Chief Mate
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Mary Nichols
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Cook
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Equipment Used
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Purpose
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3D geometry of San Andreas/Hayward Fault System.
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Notes
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See also A-1-97-SF (Auriga)
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The 1997 Bay Area Seismic Imaging Experiment (BASIX-III) was the latest
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in a series of USGS deep-crustal seismic reflection studies of the fault
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geometry and crustal structure of the San Francisco Bay Area. The specific
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goal of BASIX-III was to investigate a 15 to 25 km deep zone of
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high-amplitude seismic reflectivity that has been interpreted as a possible
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sub-horizontal detachment linking the San Andreas and Hayward Faults. A
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twelve air gun source array, deployed from the M/V Auriga and a 2400 meter
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hydrophone streamer deployed from the R/V William A. McGaw were used for
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the data acquisition. The streamer was laid directly on the bay floor at
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five separate locations in San Francisco, San Pablo, and Suisun Bays and
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remained stationary for two days at each recording site. The air gun array
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was towed past the streamer and out to offsets of 25 km and fired at
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approximately 150 to 200 meter intervals. When data processing is
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completed, the resulting images should better define the structural
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relationship of the lower crustal reflective layer and the vertical
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strike-slip faults that comprise the Pacific-North American plate boundary.
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Got Help?
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For M-1-97-SF, we would appreciate any information on -- contract, days at sea, dive count, funding, information to be derived, kms of navigation, national plan, NGDC Info, organization, owner, project number, publications, scanned materials, seismic description, station count, station description, submersible, summary, tabulated info.
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