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Near-Field Investigations of the Landers Earthquake Sequence, April to July 1992

Sieh, Kerry and Jones, Lucile and Hauksson, Egill and Hudnut, Kenneth and Eberhard-Phillips, Donna and Heaton, Thomas and Hough, Susan and Hutton, Kate and Kanamori, Hiroo and Lilje, Anne and Lindvall, Scott and McGill, Sally F. and Mori, James and Rubin, Charles and Spotila, James A. and Stock, Joann and Thio, Hong Kie and Treiman, Jerome and Wernicke, Brian and Zachariasen, Judith (1993) Near-Field Investigations of the Landers Earthquake Sequence, April to July 1992. Science, 260 (5105). pp. 171-176. ISSN 0036-8075. doi:10.1126/science.260.5105.171.

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The Landers earthquake, which had a moment magnitude (M_w) of 7.3, was the largest earthquake to strike the contiguous United States in 40 years. This earthquake resulted from the rupture of five major and many minor right-lateral faults near the southern end of the eastern California shear zone, just north of the San Andreas fault. Its M_w 6.1 preshock and M_w 6.2 aftershock had their own aftershocks and foreshocks. Surficial geological observations are consistent with local and far-field seismologic observations of the earthquake. Large surficial offsets (as great as 6 meters) and a relatively short rupture length (85 kilometers) are consistent with seismological calculations of a high stress drop (200 bars), which is in turn consistent with an apparently long recurrence interval for these faults.

Item Type:Article
Related URLs:
URLURL TypeDescription DOIArticle
Sieh, Kerry0000-0002-7311-2447
Jones, Lucile0000-0002-2690-3051
Hauksson, Egill0000-0002-6834-5051
Hudnut, Kenneth0000-0002-3168-4797
Heaton, Thomas0000-0003-3363-2197
Hough, Susan0000-0002-5980-2986
Kanamori, Hiroo0000-0001-8219-9428
Stock, Joann0000-0003-4816-7865
Wernicke, Brian0000-0002-7659-8358
Additional Information:© 1993 American Association for the Advancement of Science. We thank D. Agnew, A. Densmore, J. Dolan, K. Gross, D. Jackson, S. Larsen, M. Lisowski, M. Rymer, Z. Shen, and J. Svarc for helpful discussions and assistance. We also thank the seismic analysts of the Southern California Seismographic Network who have processed the Landers earthquake data, including R. Dollar, R. Geary, D. Given, W. Huston, S. Perry-Huston, R. Robb, and L. Wald. Data collection and processing partially supported by the Caltech Earthquake Research Affiliates Emergency Earthquake Fund and by the Southern California Earthquake Center (contribution number 25), which is funded by the National Science Foundation and the U.S. Geological Survey. Additional support from Division of Geological and Planetary Sciences, California Institute of Technology (contribution number 5217).
Group:Seismological Laboratory
Funding AgencyGrant Number
Caltech Earthquake Research Affiliates Emergency Earthquake FundUNSPECIFIED
Southern California Earthquake Center (SCEC)UNSPECIFIED
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Caltech Division of Geological and Planetary Sciences5217
Southern California Earthquake Center (SCEC)25
Issue or Number:5105
Record Number:CaltechAUTHORS:20130311-145649896
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:37447
Deposited On:12 Mar 2013 22:16
Last Modified:09 Nov 2021 23:29

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