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U.S. Geological Survey Open-File Report 2009-1100, version 1.1

High-Resolution Seismic-Reflection and Marine Magnetic Data Along the Hosgri Fault Zone, Central California


Ray W. Sliter,1 Peter J. Triezenberg,1 Patrick E. Hart,1 Janet T. Watt,1 Samuel Y. Johnson,2 and Daniel S. Scheirer1

2009, revised 2010

1 U.S. Geological Survey, Menlo Park, Calif.
2 U.S. Geological Survey, Santa Cruz, Calif.


The U.S. Geological Survey collected high-resolution shallow seismic-reflection and marine magnetic data during the summers of 2008 and 2009 in the offshore areas between Piedras Blancas and Point Sal from the nearshore (~6 m depth) to just west of the Hosgri Fault Zone, in support of the Cooperative Research and Development Agreement (CRADA) between Pacific Gas and Electric Company and the U.S. Geological Survey.

Seismic-reflection and marine magnetic data were acquired aboard the R/V Parke Snavely using a SIG 2Mille mini-sparker seismic source and a Geometrics G882 cesium-vapor marine magnetometer. More than 3,100 km of seismic and marine magnetic data were collected simultaneously along shore-perpendicular transects spaced 800 m apart, with an additional 1,340 km of marine magnetometer data collected at 400 m line spacing.

This report includes maps of the seismic survey transects, linked to Google Earth™ software, and digital data files showing images of each transect in SEG-Y, JPEG, and TIFF formats, as well as a preliminary gridded marine magnetic anomaly and residual magnetic anomaly (shallow magnetic source) maps.

For more information, contact the WCMG team.

Suggested citation:
Sliter, Ray 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, version 1.1 [].

U.S. Department of the Interior
KEN SALAZAR, Secretary

U.S. Geological Survey
Marcia K. McNutt, Director

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