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 Horton, S. Search for Related Content GeoRef GeoRef Citation

A fault model with variable slip duration for the 1989 Loma Prieta, California, earthquake determined from strong-ground-motion data

Lamont-Doherty Earth Observatory Columbia University, P.O. Box 1000, R + 9W, Palisades, New York 10964-8000

Abstract

A finite-fault model with variable slip duration is inferred from strong-ground-motion data for the Loma Prieta earthquake. Unlike previous models, slip duration is found to be consistent with fault width scaling. Slip duration varies between 1 and 6 sec at points along the fault surface with values between 3 and 6 sec, where slip amplitudes obtain or exceed the average slip of 98 cm. Modest high-frequency modifications of the slip function shape greatly enhance the data fit without significantly changing the inferred static offset or rupture characteristics. This model exhibits bilateral rupture with the propagation rate of the main energy release of 3 km/sec or less. The moment is 2.3 x 10²⁶ dyne-cm, and the largest slip amplitudes occur northwest of the hypocenter. The rake varies with position along the fault from dominantly strike slip in the southeast to dominantly reverse slip in the northwest.

This article has been cited by other articles:

				G. P. Mavroeidis and A. S. Papageorgiou Effect of Fault Rupture Characteristics on Near-Fault Strong Ground Motions Bulletin of the Seismological Society of America, February 1, 2010; 100(1): 37 - 58. [Abstract] [Full Text] [PDF]

				G. P. Mavroeidis and A. S. Papageorgiou A Mathematical Representation of Near-Fault Ground Motions Bulletin of the Seismological Society of America, June 1, 2003; 93(3): 1099 - 1131. [Abstract] [Full Text] [PDF]

				C. Stidham, M. Antolik, D. Dreger, S. Larsen, and B. Romanowicz Three-dimensional structure influences on the strong-motion wavefield of the 1989 Loma Prieta earthquake Bulletin of the Seismological Society of America, October 1, 1999; 89(5): 1184 - 1202. [Abstract] [PDF]