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USGS Coastal and Marine Geology Program

Field Activity Details for field activity B510NC

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AKA: B0510NC

Other ID: B-5-10-NC

Status: Completed

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

Funding Program(s): Coastal and Marine Catastrophic Hazards (ZP00C4A)

Principal Investigator(s): Samuel Johnson

Affiliate Investigator(s):

Information Specialist(s): Jackson Currie

Data Type(s): Location-Elevation: Navigation, Seismics: Sparker, Seismics: Sub Bottom Profiler

Scientific Purpose/Goals: characterization of northern San Andreas fault


Start Port/Location: Noyo Harbor, Fort Bragg

End Port/Location: Noyo Harbor, Fort Bragg

Start Date: 2010-09-20

End Date: 2010-10-01

Equipment Used: GPS, 512 chirp, minisparker, single channel streamer, 512 chirp-source

Information to be Derived: Shallow geologic structure and stratigraphy

Summary of Activity and Data Gathered:


Affiliate Staff:



offshore Fort Bragg

North: 40.0219 South: 39.42528 West: -124.239 East: -123.80516


photo of Derek M. Baylis
Derek M. Baylis


Beeson, J.W., and Johnson, S.Y., 2019, Offshore shallow structure and sediment distribution, Punta Gorda to Point Arena, northern California: U.S. Geological Survey Open-File Report 2019-1072,

Beeson, J.W., Johnson, S.Y., and Cochran, S.A., 2019, California State Waters Map Series Data Catalog--Punta Gorda to Point Arena Region, California: U.S. Geological Survey data release,

Beeson, J.W., Johnson, S.Y., Goldfinger, C., and Hartwell, S.R., 2016, Marine Geophysical Data - Point Arena to Cape Mendocino: U.S. Geological Survey data release.


FAN B510NC 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

Data Acquired

Survey EquipmentSurvey InfoData Type(s)Data Collected
GPS --- Navigation
Global positioning system (GPS) data (Provisional best file)
512 chirp --- Sub Bottom Profiler
Seismic FFID/Shot/CDP data (Provisional best file)
chirp (Metadata)
minisparker --- Sparker
Cradle of the earthquake; Exploring the underwater San Andreas Fault 2010: National Oceanic and Atmospheric Administration (NOAA) Ocean Explorer Explorations, accessed October 6, 2010 (Publication)
Seismic FFID/Shot/CDP data (Provisional best file)
sparker (Metadata)
GEoMappApp files
single channel streamer --- Sparker
corrected SEG-Y (published in Science Base; U.S. Geological Survey data release, DOI:10.5066/F7GT5K8R)
512 chirp-source --- Sub Bottom Profiler

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