HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) References Citation Map Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by MAGISTRALE, H. Articles by Rockwell, T. Search for Related Content GeoRef GeoRef Citation

The central and southern Elsinore fault zone, southern California

Department of Geological Sciences San Diego State University, San Diego, California, 92182-1020

Abstract

We examine hypocenter patterns, geomorphic features, total slip determinations, and slip-rate information to define the active elements of the southern and central portions of the right-lateral Elsinore fault zone in southern California. In addition to the Elsinore fault, the seismicity patterns define a continuous fault between about 33°N and 33.5°N, 7 to 12 km east of the Elsinore fault, that corresponds to the Aguanga, Agua Tibia, and Earthquake Valley faults. This part of the fault zone is double stranded. Total slip and current slip rate are apparently distributed between the two strands. Slip transfer between the strands occurs at the ends of the eastern strand over two steps with topographic signatures reflecting the step geometries in a right-lateral fault zone: a contractional left step occupied by Palomar mountain, and an extensional right step within the Vallecito-Fish Creek basin. We suggest that the two strands of the double-stranded portion of the fault zone have different ages, and the proportion of slip carried by each strand may have changed through time. Hypocenter patterns define several northeast-striking faults within the fault zone; we attribute a 1940 M_L 5.1 earthquake to one of them.

This article has been cited by other articles:

				N. M. Black and D. D. Jackson Probability of Multifault Rupture Bulletin of the Seismological Society of America, December 1, 2008; 98(6): 3017 - 3024. [Abstract] [Full Text] [PDF]

				P. Shearer, E. Hauksson, and G. Lin Southern California Hypocenter Relocation with Waveform Cross-Correlation, Part 2: Results Using Source-Specific Station Terms and Cluster Analysis Bulletin of the Seismological Society of America, June 1, 2005; 95(3): 904 - 915. [Abstract] [Full Text] [PDF]

				V.E. Langenheim, R.C. Jachens, D.M. Morton, R.W. Kistler, and J.C. Matti Geophysical and isotopic mapping of preexisting crustal structures that influenced the location and development of the San Jacinto fault zone, southern California Geological Society of America Bulletin, September 1, 2004; 116(9-10): 1143 - 1157. [Abstract] [Full Text] [PDF]

				The Seismogenic Thickness of the Southern California Crust Bulletin of the Seismological Society of America, June 1, 2004; 94(3): 940 - 960.

				Thermal Constraints on Earthquake Depths in California Bulletin of the Seismological Society of America, December 1, 2003; 93(6): 2333 - 2354.

				P. R. Vaughan, K. M. Thorup, and T. K. Rockwell Paleoseismology of the Elsinore fault at Agua Tibia Mountain southern California Bulletin of the Seismological Society of America, December 1, 1999; 89(6): 1447 - 1457. [Abstract] [PDF]