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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/5836
Title: Strong motion generation area modelling of the 2008 Iwate earthquake, Japan using modified semi-empirical technique
Authors: Sandeep
Joshi A.
Devi S.
Kumar P.
Sah S.K.
Lal S.
Kamal,
Published in: Journal of Earth System Science
Abstract: The Iwate–Miyagi earthquake (Mw 6.9) of 14 June 2008 is one of the largest intraplate earthquakes that struck north-east Japan. This earthquake has produced the largest peak ground acceleration (PGA) ever recorded. The acceleration values 4022 and 1036 gal were observed at the surface and borehole accelerometers of IWTH25. To understand the cause of this extremely large acceleration, it is highly essential to obtain the detailed rupture process of Iwate–Miyagi earthquake. The present paper estimates the rupture model for this earthquake using the modified semi-empirical technique (MSET). The detailed analysis proposes one strong motion generation area (SMGA) in the rupture plane and nucleation point in the extreme western corner of the SMGA. Using this estimated source model, a satisfactory match is observed between the simulated and actual records. The quantitative analysis of these waveforms provides an almost 1:1 match for PGA values. Furthermore, the variation of these PGA values with epicentral distance shows similar attenuation rate. These results confirm the reliability of MSET and the estimated source model of this earthquake. To the best of our knowledge, this study is the first to model SMGAs in the rupture model using MSET and provides sufficiently reliable information which will be useful for seismic hazard prevention management. © 2019, Indian Academy of Sciences.
Citation: Journal of Earth System Science (2019), 128(8): -
URI: https://doi.org/10.1007/s12040-019-1221-7
http://repository.iitr.ac.in/handle/123456789/5836
Issue Date: 2019
Publisher: Springer
Keywords: 2008 Iwate–Miyagi earthquake
high-frequency records
semi-empirical
SMGA
ISSN: 23474327
Author Scopus IDs: 55914925100
55682260000
57209296805
57192586891
57208449658
57209614174
55608940500
Author Affiliations: Sandeep, Department of Geophysics, Banaras Hindu University, Varanasi, 221 005, India
Joshi, A., Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee, India
Devi, S., Department of Geophysics, Banaras Hindu University, Varanasi, 221 005, India
Kumar, P., Wadia Institute of Himalayan Geology, Dehradun, India
Sah, S.K., Department of Geophysics, Banaras Hindu University, Varanasi, 221 005, India
Lal, S., Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee, India
Kamal, Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee, India
Funding Details: Sandeep is grateful to Prof N P Singh for his valuable suggestions and the Department of Geophysics, Banaras Hindu University, Varanasi for providing the basic research facility. Dr Preeti is thankfully acknowledged for her efforts on improving the quality of manuscript. Data employed in this work were obtained from the KiK-net (website http://www.k-net.bosai.go.jp/k-net/ and USGS (website http://www.usgs.gov/ ). This research work is a result of the sponsored project ECR/2016/000737 from the Science and Engineering Research Board, DST. PK acknowledges the director of Wadia Institute of Himalayan Geology, Dehradun.
Corresponding Author: Kumar, P.; Wadia Institute of Himalayan GeologyIndia; email: sainiparveen.saini@gmail.com
Appears in Collections:Journal Publications [ES]

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