Please use this identifier to cite or link to this item: http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/5430
Title: Estimation of strong ground motion in Southern Peninsular India by empirical Green's function method
Authors: Sivaram, K.
Gade, Maheshreddy
Raghukanth, S. T. G.
SAIKIA, UTPAL
Kanna, Nagaraju
Dept. of Earth and Climate Science
Keywords: Empirical Green's Function
Ground Motion
Peak Ground Acceleration
Response Spectra
Stochastic Finite Fault Model
2017
Issue Date: Jun-2017
Publisher: Indian Academy of Sciences
Citation: Current Science, 112(11), 2273-2283.
Abstract: In the present study, strong motions are estimated at 17 stations in Southern Peninsular India (SPI) for the 7 February 1900 Coimbatore earthquake (M-w 6) using the empirical Green's function (EGF) method. The broadband recordings of three small earthquakes of M-L 3.5, 2.9 and 3.0 respectively, are taken as EGFs to simulate ground motion. The slip distribution of the main event is considered as a von Karman random field. The stress drops of the three small events estimated from finite fault stochastic seismological model lie between 130 and 140 bars. The peak ground acceleration (PGA) values, an ensemble of acceleration time histories and response spectra, are estimated at all the 17 stations using corresponding EGFs, and the mean response spectra are reported. Another estimate of PGA is also obtained using the stochastic seismological model. The estimated PGA values from the two methods are compared to check the consistency of the results. It is observed that the mean PGA values are within the bounds of the maximum and minimum PGA values obtained from the EGF method, while the differences at some stations can be attributed to the local site conditions.
URI: http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/5430
https://doi.org/10.18520/cs/v112/i11/2273-2283
ISSN: 0011-3891
Appears in Collections:JOURNAL ARTICLES

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