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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/5833
Title: Effect of frequency-dependent radiation pattern in the strong motion simulation of the 2011 Tohoku earthquake, Japan, using modified semi-empirical method
Authors: Sandeep
Joshi A.
Kamal,
Kumar P.
Kumar A.
Published in: Natural Hazards
Abstract: We perform a strong ground motion simulation using a modified semi-empirical technique (Midorikawa in Tectonophysics 218:287-295, 1993), with frequency-dependent radiation pattern model. Joshi et al. (Nat Hazards 71:587-609, 2014) have modified the semi-empirical technique to incorporate the modeling of strong motion generation areas (SMGAs). A frequency-dependent radiation pattern model is applied to simulate high-frequency ground motion more precisely. Identified SMGAs (Kurahashi and Irikura in Earth Planets Space 63:571-576, 2011) of the 2011 off the Pacific coast of Tohoku earthquake (Mw = 9.0) were modeled using this modified technique. We analyzed the effect of changing seismic moment values of SMGAs on the simulated acceleration time series. Final selection of the moment values of SMGAs is based on the root-mean-square error (RMSE) of waveform comparison. Records are simulated for both frequency-dependent and constant radiation pattern function. Simulated records for both cases are compared with observed records in terms of peak ground acceleration, peak ground velocity and pseudo-acceleration response spectra at different stations. Comparison of simulated and observed records in terms of RMSE suggests that the method is capable of simulating record, which matches in a wide frequency range for this earthquake and bears realistic appearance in terms of shape and strong motion parameters. The results confirm the efficacy and suitability of rupture model defined by five SMGAs for the developed modified technique. © 2014 Springer Science+Business Media Dordrecht.
Citation: Natural Hazards (2014), 73(3): 1499-1521
URI: https://doi.org/10.1007/s11069-014-1153-0
http://repository.iitr.ac.in/handle/123456789/5833
Issue Date: 2014
Publisher: Kluwer Academic Publishers
Keywords: 2011 Tohoku earthquake
Frequency-dependent radiation pattern
Semi-empirical
Strong ground motion
Strong motion generation area
ISSN: 0921030X
Author Scopus IDs: 55914925100
55682260000
55608940500
57192586891
57209569502
Author Affiliations: Sandeep, Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India
Joshi, A., Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India
Kamal, Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India
Kumar, P., Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India
Kumar, A., Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India
Corresponding Author: Sandeep; Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India; email: sandeeparora_geokuk@yahoo.com
Appears in Collections:Journal Publications [ES]

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