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JOURNAL OF STRUCTURAL MECHANICS AND EARTHQUAKE ENGINEERING
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Multiple event analysis of 1979 Imperial Valley earthquake using causalitconcept of earthquake motionD
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Using the causality concept, we propose a procedure to deconvolute a seismic wave into a minimum phase shift function and a function representing source mechanisms. An analysis of identifying the source mechanism of the 1979 Imperial Valley, California earthquake is made utilizing two functions deconvoluted from the near field horizontal acceleograms. The multiple rupture process is confirmed by the fact that five major small events are identified on the fault surface. The ramp function and rupture velocity are also estimated and used to synthesize the earthquake motion. The set of the results indicates an effectiveness of the proposed procedure.
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