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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/5905
Title: Attenuation Tomography Based on Strong Motion Data: Case Study of Central Honshu Region, Japan
Authors: Kumar P.
Joshi A.
Verma O.P.
Published in: Pure and Applied Geophysics
Abstract: Three-dimensional frequency dependent S-wave quality factor (Q?(f)) value for the central Honshu region of Japan has been determined in this paper using an algorithm based on inversion of strong motion data. The method of inversion for determination of three-dimensional attenuation coefficients is proposed by Hashida and Shimazaki (J Phys Earth. 32, 299-316, 1984) and has been used and modified by Joshi (Curr Sci. 90, 581-585, 2006; Nat Hazards. 43, 129-146, 2007) and Joshiet al. (J. Seismol. 14, 247-272, 2010). Twenty-one earthquakes digitally recorded on strong motion stations of Kik-net network have been used in this work. The magnitude of these earthquake ranges from 3.1 to 4.2 and depth ranging from 5 to 20 km, respectively. The borehole data having high signal to noise ratio and minimum site effect is used in the present work. The attenuation structure is determined by dividing the entire area into twenty-five three-dimensional blocks of uniform thickness having different frequency-dependent shear wave quality factor. Shear wave quality factor values have been determined at frequencies of 2.5, 7.0 and 10 Hz from record in a rectangular grid defined by 35.4°N to 36.4°N and 137.2°E to 138.2°E. The obtained attenuation structure is compared with the available geological features in the region and comparison shows that the obtained structure is capable of resolving important tectonic features present in the area. The proposed attenuation structure is compared with the probabilistic seismic hazard map of the region and shows that it bears some remarkable similarity in the patterns seen in seismic hazard map. © 2013 Springer Basel.
Citation: Pure and Applied Geophysics (2013), 170(12): 2087-2106
URI: https://doi.org/10.1007/s00024-013-0658-x
http://repository.iitr.ac.in/handle/123456789/5905
Issue Date: 2013
Keywords: attenuation
inversion
Quality factor
strong motion network
ISSN: 334553
Author Scopus IDs: 57192586891
55682260000
57207560459
Author Affiliations: Kumar, P., Indian Institute of Technology, Roorkee, Uttaranchal, India
Joshi, A., Indian Institute of Technology, Roorkee, Uttaranchal, India
Verma, O.P., Indian Institute of Technology, Roorkee, Uttaranchal, India
Funding Details: Authors sincerely, thank Indian Institute of Technology, Roorkee for supporting the research presented in this paper. Strong motion data recorded by the Kyoshin-Net of the National Research Institute for Earth Science and Disaster Prevention, Japan, was used in the present work. The work presented in this paper is an outcome of the sponsored project from ministry of Earth Sciences, Government of India with grant no. MoES/P.O.(Seismo)/1(42)/2009.
Corresponding Author: Joshi, A.; Indian Institute of Technology, Roorkee, Uttaranchal, India; email: anushijos@yahoo.co.in
Appears in Collections:Journal Publications [ES]

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