DOI: 10.5176/2251-3361_GEOS12.79
Authors: Pushpa Kumari and A. Joshi, M. L. Sharma
Abstract: The semi-empirical technique given by [1] has been modeled in the present work for component wise simulation of strong ground motion. Seismic moment and effect of radiation pattern has been included in the revised technique instead of purely attenuation relationship. Simple vector theory is used for component wise simulation of strong ground motion. The modified technique has been applied to simulate the record of Sumatra earthquake of Dec 26, 2004. Synthetic records obtained from modified semi-empirical technique and empirical Green’s function (EGF) techniques have been compared with the observed record. Comparison of synthetic and observed record for various possibilities of rupture parameters suggest that the rupture of Sumatra earthquake propagated in northward direction with rupture velocity 3.0 km/sec. The comparison of observed and synthetic record from final rupture model confirms the efficacy of the modified semi-empirical technique or component wise simulation of strong motion record.
Keywords: semi-empirical; component; Sumatra; earthquake; sub-fault
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