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Laboratory earthquakes along inhomogeneous faults: Directionality and supershear

Xia, Kaiwen and Rosakis, Ares J. and Kanamori, Hiroo and Rice, James R. (2005) Laboratory earthquakes along inhomogeneous faults: Directionality and supershear. Science, 308 (5722). pp. 681-684. ISSN 0036-8075.

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We report on the experimental observation of spontaneously nucleated ruptures occurring on frictionally held bimaterial interfaces with small amounts of wave speed mismatch. Rupture is always found to be asymmetric bilateral. In one direction, rupture always propagates at the generalized Rayleigh wave speed, whereas in the opposite direction it is subshear or it transitions to supershear. The lack of a preferred rupture direction and the conditions leading to supershear are discussed in relation to existing theory and to the earthquake sequence in Parkfield, California, and in North Anatolia.

Item Type:Article
Related URLs:
URLURL TypeDescription DOIArticle
Rosakis, Ares J.0000-0003-0559-0794
Kanamori, Hiroo0000-0001-8219-9428
Additional Information:© 2005 American Association for the Advancement of Science. Received 2 December 2004; accepted 16 February 2. A.R., H.K., and K.X. acknowledge the support of NSF EAR 0207873 and Office of Naval Research N00014-03-0435. J.R. acknowledges the support by NSF EAR 0125702.
Funding AgencyGrant Number
NSFEAR 0207873
Office of Naval Research (ONR)N00014-03-0435
NSFEAR 0125702
Issue or Number:5722
Record Number:CaltechAUTHORS:20141111-091822890
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:51549
Deposited By: Tony Diaz
Deposited On:11 Nov 2014 21:27
Last Modified:09 Mar 2020 13:19

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