期刊
PURE AND APPLIED GEOPHYSICS
卷 167, 期 10, 页码 1247-1257出版社
SPRINGER BASEL AG
DOI: 10.1007/s00024-009-0022-3
关键词
Sediment thickness; converted phase; attenuation
资金
- Department of Science and Technology/Ministry of Earth Sciences, Government of India
An inexpensive method using natural earthquake data is utilized for determining the sedimentary thickness in Kachchh. The Institute of Seismological Research (ISR) is operating a network of broadband seismographs and strong motion accelerographs in Gujarat. We used data from 13 broadband seismographs and two strong motion accelerographs in the study. The stations are within 5 to 80 km from the epicenters. In this study the S-to-P converted phase, S-P, is used. This phase is generated due to large impedance contrast between sediments and basement. This phase is clear in the vertical component. The difference in the travel times of S and S-P phases and velocities of P and S waves is used for determining the sedimentary layer thickness. The thickness of sediments beneath each of these 15 stations was determined covering an area of 23,500 sq km.
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