Field Activity Details for field activity M197SF

AKA: none

Other ID: M-1-97-SF,BASIX_III

Status: Completed

Organization(s):

Funding Program(s): Bay Area Seismic Imaging Experiment (BASIX) (MU017)

Principal Investigator(s): Jonathan Childs, Jonathan Childs, Patrick Hart

Affiliate Investigator(s):

Information Specialist(s): Dennis Mann

Data Type(s): Seismics: Ocean Bottom Seismometer, Location-Elevation: Navigation

Scientific Purpose/Goals: 3D geometry of San Andreas/Hayward Fault System.

Vehicle(s):

Start Port/Location: Redwood City, CA

End Port/Location: Redwood City, CA

Start Date: 1997-08-31

End Date: 1997-09-15

Equipment Used: seismograph, YoNav, GPS

Information to be Derived:

Summary of Activity and Data Gathered:

Staff: Ray Sliter, Thomas Parsons, Walt Olson, Kevin O'Toole, Hal Williams, Dave Hogg, Bill Robinson, Jeff Brody, Dennis Mann, Steve Wessels, Diane Minasian, Steve Bean

Affiliate Staff:
Bill Cooperwat (Stanford) - Geologist
Terence Shinn - Ship Captain
Mary Nichols - Cook

Notes: 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.

Staff information imported from InfoBank
Pat Hart (USGS Western Region) - Chief Scientist
Jon Childs (USGS Western Region) - Chief Scientist
Ray Sliter (USGS Western Region) - Geophysicist
Tom Parsons (USGS Western Region) - Geophysicist
Walt Olson (USGS Western Region) - Mechanical Technician
Kevin O'Toole (USGS Western Region) - Mechanical Technician
Hal Williams (USGS Western) - Mechanical Technician
Jon Childs (Region USGS Western Region) - Chief Scientist
Dave Hogg (USGS Western Region) - Electrical Technician
Bill Robinson (USGS Western Region) - Electrical Engineer
Jeff Brody (USGS Western Region) - Computer Specialist
Dennis Mann (USGS Western Region) - Data Curator
Steve Wessels (USGS Western Region) - Photographer
Bill Cooperwat (Stanford) - Geologist
Diane Minasian (USGS Western Region) - Geologist
Terence Shinn - Ship Captain
Dave - Chief Engineer
Steve Bean - Chief Mate
Mary Nichols - Cook

Location:

San Francisco Bay

Platform(s):

Publications

Portals/Viewers

Data Acquired