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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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Bounding Coordinates
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38.07104
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-122.44003 -122.09148 |
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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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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)
The 1997 Bay Area Seismic Imaging Experiment (BASIX-III) was the latest
in a series of USGS deep-crustal seismic reflection studies of the fault
geometry and crustal structure of the San Francisco Bay Area. The specific
goal of BASIX-III was to investigate a 15 to 25 km deep zone of
high-amplitude seismic reflectivity that has been interpreted as a possible
sub-horizontal detachment linking the San Andreas and Hayward Faults. A
twelve air gun source array, deployed from the M/V Auriga and a 2400 meter
hydrophone streamer deployed from the R/V William A. McGaw were used for
the data acquisition. The streamer was laid directly on the bay floor at
five separate locations in San Francisco, San Pablo, and Suisun Bays and
remained stationary for two days at each recording site. The air gun array
was towed past the streamer and out to offsets of 25 km and fired at
approximately 150 to 200 meter intervals. When data processing is
completed, the resulting images should better define the structural
relationship of the lower crustal reflective layer and the vertical
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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