Skip to main content
U.S. flag

An official website of the United States government

Seismicity remotely triggered by the magnitude 7.3 landers, california, earthquake

January 1, 1993

The magnitude 7.3 Landers earthquake of 28 June 1992 triggered a remarkably sudden and widespread increase in earthquake activity across much of the western United States. The triggered earthquakes, which occurred at distances up to 1250 kilometers (17 source dimensions) from the Landers mainshock, were confined to areas of persistent seismicity and strike-slip to normal faulting. Many of the triggered areas also are sites of geothermal and recent volcanic activity. Static stress changes calculated for elastic models of the earthquake appear to be too small to have caused the triggering. The most promising explanations involve nonlinear interactions between large dynamic strains accompanying seismic waves from the mainshock and crustal fluids (perhaps including crustal magma).

Citation Information

Publication Year 1993
Title Seismicity remotely triggered by the magnitude 7.3 landers, california, earthquake
Authors D. P. Hill, P.A. Reasenberg, A. Michael, W.J. Arabaz, G. Beroza, D. Brumbaugh, J.N. Brune, R. Castro, S. Davis, D. Depolo, W.L. Ellsworth, J. Gomberg, S. Harmsen, L. House, S.M. Jackson, M. J. S. Johnston, L. Jones, Rebecca Hylton Keller, S. Malone, L. Munguia, S. Nava, J.C. Pechmann, A. Sanford, R. W. Simpson, R. B. Smith, M. Stark, M. Stickney, A. Vidal, S. Walter, V. Wong, J. Zollweg
Publication Type Article
Publication Subtype Journal Article
Series Title Science
Index ID 70018043
Record Source USGS Publications Warehouse

Related Content