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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/5828
Title: Modeling of strong motion generation areas of the 2011 Tohoku, Japan earthquake using modified semi-empirical technique
Authors: Joshi A.
Sandeep
Kamal,
Published in: Natural Hazards
Abstract: Modification in the semi-empirical technique for the simulation of strong ground motion has been introduced to incorporate the strong motion generation areas (SMGA) in the modeled rupture plane. Strong motion generation areas identified within the rupture plane of the Tohoku earthquake of March 11, 2011 (M w = 9.0), have been modeled using this modified technique. Two different source models having four and five SMGAs, respectively, are considered for modeling purpose. Strong motion records using modified semi-empirical technique have been simulated at two near-field stations located at epicentral distance of 137 and 140 km, respectively, using two different source models. Comparison of the observed and simulated acceleration waveforms is made in terms of root mean square error (RMSE) at both stations. Minimum root mean square error of the waveform comparison has been obtained at both the stations for source model having five SMGAs. Simulations from same rupture model have been made at other four stations lying at epicentral distance between 154 and 249 km. Comparison of observed and simulated records has been made in terms of RMSE in acceleration records, velocity records and response spectra at each six station. Simulations have been made at six other stations to obtain distribution of peak ground acceleration and peak ground velocity with hypocentral distance. Peak ground acceleration and velocity from simulated and observed records are compared at twelve stations surrounding the source of Tohoku earthquake. Comparison of waveforms and parameters extracted from observed and simulated strong motion records confirms the efficacy of the developed modified technique to model earthquake characterized by SMGAs. © 2013 Springer Science+Business Media Dordrecht.
Citation: Natural Hazards (2014), 71(1): 587-609
URI: https://doi.org/10.1007/s11069-013-0922-5
http://repository.iitr.ac.in/handle/123456789/5828
Issue Date: 2014
Keywords: Semi-empirical
Strong ground motion
Strong motion generation areas
Tohoku earthquake
ISSN: 0921030X
Author Scopus IDs: 55682260000
55914925100
55608940500
Author Affiliations: Joshi, A., Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee, India
Sandeep, Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee, India
Kamal, Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee, India
Corresponding Author: Sandeep; Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee, India; email: sandeeparora_geokuk@yahoo.com
Appears in Collections:Journal Publications [ES]

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