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USGS Coastal and Marine Geology Program

Field Activity Details for field activity S608SC

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AKA: none

Other ID: S-6-08-SC

Status: Completed

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

Funding Program(s):

Principal Investigator(s): Samuel Johnson

Affiliate Investigator(s):

Information Specialist(s): Peter Triezenberg

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

Scientific Purpose/Goals: Marine seismic reflection data are used to image and map sedimentary and structural features of the seafloor and subsurface. These data were acquired in in the offshore areas between Cayucos and Pismo Beach from the nearshore (~6 m depth) to just west of the Hosgri Fault Zone, in support of the California State Waters Mapping Program and the Cooperative Research and Development Agreement (CRADA) between Pacific Gas & Electric Company and the U.S. Geological Survey. The specific objective of this seismic survey is to provide seismic reflection images and magnetic anomaly maps of the depositional geometry of the upper 50 m of subbottom stratigraphy in order to better understand the mechanisms of sediment transport and deposition. Another objective of the survey is to identify offsets in sedimentary strata and basement rocks to characterize important fault properties. These seismic profiles provide high-quality images with approximately 1 m of vertical resolution and up to 120 m of subbottom penetration.


Start Port/Location:

End Port/Location:

Start Date: 2008-06-09

End Date: 2008-06-27

Equipment Used: magnetics, GPS, sparker, Chirp

Information to be Derived:

Summary of Activity and Data Gathered:


Affiliate Staff:

Notes: planned activity; 9 days



North: 35.44563 South: 35.01894 West: -121.051 East: -120.64456


photo of Parke Snavely
Parke Snavely


Johnson, S.Y., Hartwell, S.R., Watt, J.T., Beeson, J.W., Dartnell, P., and Cochran, S.A., 2019, California State Waters Map Series Data Catalog--Point Sur to Point Arguello Region, California: U.S. Geological Survey data release.

Kluesner, J.W., Balster-Gee, A.F., and Johnson, S.Y., 2023, Reprocessed single channel sparker seismic reflection data offshore central California from USGS field activities S-6-08-SC and S-6-09-SC: U.S. Geological Survey data release,

Sliter, R.W., Triezenberg, Peter J., Hart, Patrick E., Watt, Janet T., Johnson, Samuel Y., and Scheirer, Daniel S., 2009, revised 2010, High-resolution seismic reflection and marine magnetic data along the Hosgri Fault Zone, central California: U.S. Geological Survey Open-File Report 2009-1100, 11 p.,


FAN S608SC 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
magnetics --- Magnetics
Edited magnetics data s-6-08-sc.220_060 (Provisional best file)
GPS --- Navigation
Global positioning system (GPS) data s-6-08-sc.061_magnetics
Global positioning system (GPS) data s-6-08-sc.061 (Provisional best file)
Best file with nav in ArcInfo E00 format
Global positioning system (GPS) data s-6-08-sc.060
sparker --- Sparker
sparker.5.sgy.tar.gz data s-6-08-sc.sparker.5.sgy.tar.gz (Provisional best file)
sparker.6.sgy.tar.gz data s-6-08-sc.sparker.6.sgy.tar.gz (Provisional best file)
sparker.7.sgy.tar.gz data s-6-08-sc.sparker.7.sgy.tar.gz (Provisional best file)
sparker.1.sgy.tar.gz data s-6-08-sc.sparker.1.sgy.tar.gz (Provisional best file)
sparker.10.sgy.tar.gz data s-6-08-sc.sparker.10.sgy.tar.gz (Provisional best file)
sparker.11.sgy.tar.gz data s-6-08-sc.sparker.11.sgy.tar.gz (Provisional best file)
sparker.4.sgy.tar.gz data s-6-08-sc.sparker.4.sgy.tar.gz (Provisional best file)
sparker.2.sgy.tar.gz data s-6-08-sc.sparker.2.sgy.tar.gz (Provisional best file)
sparker.3.sgy.tar.gz data s-6-08-sc.sparker.3.sgy.tar.gz (Provisional best file)
sparker.8.sgy.tar.gz data s-6-08-sc.sparker.8.sgy.tar.gz (Provisional best file)
Seismic FFID/Shot/CDP data s-6-08-sc.410_sparker (Provisional best file)
Survey information
sparker.9.sgy.tar.gz data s-6-08-sc.sparker.9.sgy.tar.gz (Provisional best file) data
Reprocessed single channel sparker seismic reflection data (Reprocessed single channel sparker seismic reflection data offshore central California from USGS field activity S-6-08-SC)
Sparker seismic data
Chirp --- Boomer
Chirp seismic data
chirp.sgy.tar.gz data s-6-08-sc.chirp.sgy.tar.gz (Provisional best file)
Survey information
Seismic FFID/Shot/CDP data s-6-08-sc.410_chirp (Provisional best file) data (Provisional best file)

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