Bulletin of the Seismological Society of America · 2004 · 44 citations · 24 references
Natural SciencesEarth SciencesGeophysicsSeismologyTectonicsTectonophysicsEarthquake Rupture DynamicsFault MechanicsFault Zone SeismologyRupture DynamicsStress AccumulationStrong-motion SeismologyDynamic Stress DropEarthquake Stress DropFault Stress EvolutionFault Zone Deformation MechanismsOvershootStrain EnergyStrain Energy AccumulationStress Drop Estimation
The apparent stress and stress drop of the Chi-Chi, Taiwan, earthquake are estimated from near-field seismograms. The estimated apparent stress and stress drop for the southern part of the fault are about 100 bars lower than those for the northern part. The estimated ratio E s/ M also suggests that there is a higher dynamic stress drop in the northern part than in the southern one. This indicates the transformation of a higher percentage of strain energy into the seismic-wave energy in the northern part than in the southern part. Based on a parameter proposed by Ramon Zuniga (1993), we propose that the stress model of frictional overshoot can interpret the rupture of the Chelungpu fault, on which the Chi-Chi, Taiwan, earthquake occurred. Manuscript received 31 July 2000.
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