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USGS Coastal and Marine Geology Program

Field Activity Details for field activity L106SF

AKA: L-1-06-NC

Other ID: L-1-06-SF

Status: Completed

Organization(s): USGS, Pacific Coastal and Marine Science Center

Funding Program(s): Other (Other)

Principal Investigator(s): Holly Ryan

Affiliate Investigator(s):

Information Specialist(s): Ray Sliter

Data Type(s): Location-Elevation: Navigation, Seismics: Boomer, Seismics: Sparker

Scientific Purpose/Goals: Evaluate recent activity off offshore faults and determine thickness of ebb-tide delta

Vehicle(s): None

Start Port/Location: Sausalito, CA

End Port/Location: Sausalito, CA

Start Date: 2006-09-25

End Date: 2006-10-03

Equipment Used: Other, Chirp, GPS, minisparker

Information to be Derived: Geometry of offshore faults, isopach and internal structure of sand waves in ebb-tide delta.

Summary of Activity and Data Gathered: updating AKA

Staff: Patrick Hart, Gerry Hatcher, Larry Kooker, Ray Sliter, Peter Triezenberg

Affiliate Staff:
Anne Gartner (USGS) - Watchstander

Notes: Single-channel 2 kJ mini-sparker seismic reflection system and chirp profiler

Staff information imported from InfoBank
Holly Ryan (USGS) - Chief Scientist
Ray Sliter (USGS) - Watchstander
Pat Hart (USGS) - Watchstander
Anne Gartner (USGS) - Watchstander
Peter Triezenberg (USGS) - Watchstander
Larry Kooker (USGS) - Electronic Tech
Gerry Hatcher (USGS) - Electronic Tech



North: 37.89475 South: 37.68048 West: -122.766 East: -122.45933




Gartner, A., Ryan, H., and Hart, P., 2007, Surveying Faults and Sediment Outside the Entrance to San Francisco Bay: U.S. Geological Survey Sound Waves Newsletter March 2007,

Ryan, H.F., Sliter, R.W., and Hart, P.E., 2019, Chirp and minisparker seismic-reflection data of field activity L-1-06-SF collected offshore Bolinas to San Francisco, California from 2006-09-25 to 2006-10-03: U.S. Geological Survey data release,


FAN L106SF has data viewable in the GeoMappApp/Virtual Ocean applications. To view this data in these applications go to and See the instructions for locating USGS data in these applications. You can also view the imagery created from the SEGY data at

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