Reports

Dynamics of Liquefaction During the 1987 Superstition Hills, California, Earthquake

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Science  07 Apr 1989:
Vol. 244, Issue 4900, pp. 56-59
DOI: 10.1126/science.244.4900.56

Abstract

Simultaneous measurements of seismically induced pore-water pressure changes and surface and subsurface accelerations at a site undergoing liquefaction caused by the Superstition Hills, California, earthquake (24 November 1987; M = 6.6) reveal that total pore pressures approached lithostatic conditions, but, unexpectedly, after most of the strong motion ceased. Excess pore pressures were generated once horizontal acceleration exceeded a threshold value.

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