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Open-File Report 2006-1373

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- CABRILLO Project | High-resolution boomer seismic-reflection profiles of the shelf off southern California from cruise A-1-00-SC: Santa Monica Bay to San Diego*by*
Christina E. Gutmacher1, Stephanie L. Ross1, Peter J. Triezenberg1, Ray W. Sliter1, William R. Normark1, Brian D. Edwards1

2006

1U.S. Geological Survey, Menlo Park, CA 94025
Abstract
 				High-resolution boomer data were collected in the California Continental Borderland as part of the  				southern California Earthquake Hazards Task of the Southern California Coastal and Marine  				Geology Regional Investigations Project. During the period from 1997 to 2002, five data-acquisition  				cruises collected seismic-reflection data using several different systems from offshore Santa  				Barbara, California, south to the Exclusive Economic Zone boundary with Mexico. A key mission  				of this project was to map late Quaternary deformation in addition to improving our understanding  				of which offshore fault zones might have potential to damage highly populated areas of southern  				California. State regulations concerning the use of seismic-reflection equipment within three miles  				of the coastline precluded the routine gathering of high-resolution multichannel data in that swath  				adjacent to the coast. Boomer seismic-reflection data, however, can be obtained within the   				state 3-mile limit provided the operation receives authorization from the California State Lands  				Commission. 			

 				The Geopulse boomer data accessible through this report were collected on the cruise A-1-00-SC,  				which was the only survey where we requested permission to work inside the 3-mile limit of the  				State of California. These data are critical to discovering connections between  				onshore and offshore faults, the overall lengths of which are related to the potential size of an  				earthquake that might be generated along them. The 2000 survey was designed to fill the gap  				between onshore data and reflection data obtained in deeper water on previous cruises  				as well as data anticipated from future surveys. This report includes trackline maps showing the  				location of the data, as well as both digital data files (SEG-Y) and images of all of the profiles. 			
						For more information contact: Ray Sliter |
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