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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/5910
Title: Estimation of model parameter of Sumatra earthquake using empirical Green's function technique and generation of hypothetical earthquake scenario for Andaman Island, India
Authors: Joshi A.
Kumari P.
Kumar S.
Sharma, Mukat Lal
Ghosh A.K.
Agarwal M.K.
Ravikiran A.
Published in: Natural Hazards
Abstract: Empirical Green's function (EGF) technique is considered to be most effective technique for simulation of ground motions due to a finite earthquake source. In the present paper, this technique has been used to simulate ground motion due to a great earthquake. The coastal region of Sumatra Island has been visited by a great earthquake on December 26, 2004. This earthquake has been recorded at several broadband stations including a nearest broadband station PSI in Indonesia. The shear wave contributions in both horizontal components have been simulated at PSI station using EGF technique. The comparison of simulated and observed waveform has been made for various possibilities of rupture parameters in terms of root mean square error. The final rupture model supports rupture velocity of 3.0 km/s with nucleation point supporting northward propagating rupture that coincide with high-slip asperity defined by Sorensen et al. (Bull Seism Soc Am 97:S139-S151, 2007). The final modeling parameters have been used to simulate record at MDRS station in coastal state of Tamilnadu, India. In an attempt to model a scenario of great earthquake in the Andaman Island, a hypothetical rupture plane is modeled in this region. The event occurred on August 10, 2008 of magnitude 6.2 (M w) recorded on strong motion array at Port Blair has been used as EGF to simulate records due to the hypothetical great earthquake. Possibilities of earthquake due to the oblique strike-slip and thrust mechanism have been modeled in the present paper. Several possibilities of nucleation point for both cases has been considered, and it is seen that variation of peak ground acceleration at Port Blair station for strike-slip and thrust mechanism is 126-738 gals and 647-2,571 gals, respectively, which indicate high seismic hazard potential of Andaman Island. © 2012 Springer Science+Business Media B.V.
Citation: Natural Hazards (2012), 62(3): 1081-1108
URI: https://doi.org/10.1007/s11069-012-0135-3
http://repository.iitr.ac.in/handle/123456789/5910
Issue Date: 2012
Keywords: Andaman
Rupture
Simulation
Strong motion
Sumatra earthquake
ISSN: 0921030X
Author Scopus IDs: 55682260000
55262299400
7405769266
7403269008
57203612042
57198019474
56419884900
Author Affiliations: Joshi, A., Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee, India
Kumari, P., Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee, India
Kumar, S., Department of Geophysics, Kurukshetra University, Kurukshetra, India
Sharma, M.L., Department of Earthquake Engineering, Indian Institute of Technology Roorkee, Roorkee, India
Ghosh, A.K., Healths, Safety and Environment Group, Bhaba Atomic Research Center, Trombay, Mumbai, India
Agarwal, M.K., Reactor Safety Division, Bhaba Atomic Research Center, Trombay, Mumbai, India
Ravikiran, A., Reactor Safety Division, Bhaba Atomic Research Center, Trombay, Mumbai, India
Corresponding Author: Kumari, P.; Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee, India; email: pushpa19chary@gmail.com
Appears in Collections:Journal Publications [EQ]
Journal Publications [ES]

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