Skip Links

USGS - science for a changing world

Open File Report 2014–1094

Bathymetry and Acoustic Backscatter—Outer Mainland Shelf and Slope, Gulf of Santa Catalina, Southern California

By Peter Dartnell, James E. Conrad, Holly F. Ryan, and David P. Finlayson

Thumbnail of and link to report PDF (1.9 MB)Abstract

In 2010 and 2011, scientists from the U.S. Geological Survey (USGS), Coastal and Marine Geology Program, acquired bathymetry and acoustic-backscatter data from the outer shelf and slope region offshore of southern California. The surveys were conducted as part of the USGS Marine Geohazards Program. Assessment of the hazards posed by offshore faults, submarine landslides, and tsunamis are facilitated by accurate and detailed bathymetric data. The surveys were conducted using the USGS R/V Parke Snavely outfitted with a 100-kHz Reson 7111 multibeam-echosounder system. This report provides the bathymetry and backscatter data acquired during these surveys in several formats, a summary of the mapping mission, maps of bathymetry and backscatter, and Federal Geographic Data Committee (FGDC) metadata.

First posted May 16, 2014

For additional information, contact:
Pacific Coastal and Marine Science Center
U.S. Geological Survey
Pacific Science Center
400 Natural Bridges Drive
Santa Cruz, CA 95060

Part or all of this report is presented in Portable Document Format (PDF). For best results viewing and printing PDF documents, it is recommended that you download the documents to your computer and open them with Adobe Reader. PDF documents opened from your browser may not display or print as intended. Download the latest version of Adobe Reader, free of charge.

Suggested citation:

Dartnell, P., Conrad, J.E., Ryan, H.F., Finlayson, D.P, 2014, Bathymetry and acoustic backscatter—outer mainland shelf and slope, Gulf of Santa Catalina, southern California: U.S. Geological Survey Open-File Report 1094, 15 p.,

ISSN 2331-1258 (online)




Survey Results


References Cited

Accessibility FOIA Privacy Policies and Notices logo U.S. Department of the Interior | U.S. Geological Survey
Page Contact Information: GS Pubs Web Contact
Page Last Modified: Friday, May 16, 2014, 04:53:45 PM