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Ground failure along the New River caused by the October 1979 Imperial Valley earthquake sequence

U.S. GEOLOGICAL SURVEY SEISMOLOGICAL LABORATORY CALIFORNIA INSTITUTE OF TECHNOLOGY, PASADENA, CALIFORNIA 91125
INSTITUTE OF GEOPHYSICS AND PLANETARY PHYSICS AND DEPARTMENT OF APPLIED MECHANICS AND ENGINEERING SCIENCE UNIVERSITY OF CALIFORNIA, SAN DIEGO, LA JOLLA, CALIFORNIA 92093

Abstract

We recognized a number of ground failures along the south bank of the New River north of Brawley, California, following the 15 October 1979 Imperial Valley, California, earthquake sequence. The zone includes a large pond and numerous sand boils, apparently caused by liquefaction, near the Del Rio Country Club. These ground failures, together with failures at the New River bridge west of Brawley and at Wiest Lake, form a discontinuous zone 10 km long. While this zone appears to coincide with the aftershocks following the 16 October 1979, M_L 5.8, Brawley earthquake (the largest aftershock of the Imperial Valley earthquake), a cause and effect relationship cannot be demonstrated. No evidence of tectonic surface faulting could be found.

This article has been cited by other articles:

				J. G. ANDERSON and P. BODIN Earthquake recurrence models and historical seismicity in the Mexicali-Imperial Valley Bulletin of the Seismological Society of America, April 1, 1987; 77(2): 562 - 578. [Abstract] [PDF]