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Stochastic finite fault modelling of M w 4.8 earthquake in Kachchh, Gujarat, India

Chopra, S and Kumar, D and Choudhury, P and Yadav, RBS (2012) Stochastic finite fault modelling of M w 4.8 earthquake in Kachchh, Gujarat, India. Journal of Seismology, 16 (3). pp. 435-449.

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The modified stochastic finite fault modelling technique based on dynamic corner frequency has been used to simulate the strong ground motions of M w 4. 8 earthquake in the Kachchh region of Gujarat, India. The accelerograms have been simulated for 14 strong motion accelerographs sites (11 sites in Kachchh and three sites in Saurashtra) where the earthquake has been recorded. The region-specific source, attenuation and generic site parameters, which are derived from recordings of small to moderate earthquakes, have been used for the simulations. The main characteristics of the simulated accelerograms, comprised of peak ground acceleration (pga), duration, Fourier and response spectra, predominant period, are in general in good agreement with those of observed ones at most of the sites. The rate of decay of simulated pga values with distance is found to be similar with that of observed values. The successful modelling of the empirical accelerograms indicates that the method can be used to prepare wide range of scenarios based on simulation which provide the information useful for evaluating and mitigating the seismic hazard in the region.

Item Type: Article
Additional Information: Copyright of this article belongs to Springer
Uncontrolled Keywords: Stochastic simulation;Dynamic corner frequency;pga;Kachchh
Subjects: Earth Resources and Remote Sensing
Depositing User: INCOIS Library
Date Deposited: 12 Dec 2013 15:28
Last Modified: 12 Dec 2013 15:28

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