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Local site effects in Latur, India: an empirical study based on the aftershocks of the Killari earthquake of September 29, 1993 |
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| Authors: | V Midzi D D Singh K Atakan and J Havskov |
| Institution: | a Institute of Solid Earth Physics, University of Bergen, Allégt. 41, Bergen N-5007, Norway b Department of Meteorological Services, Goetz Observatory, Bulawayo, Zimbabwe c Geodynamics Research Center, Ehime University, Bunkyo-cho, Matsuyama 790-8577, Japan |
| Abstract: | The site amplification is estimated at five seismic stations of the Latur region using the horizontal to vertical spectral ratios of 33 aftershocks of the main Killari earthquake of September 29, 1993 (UTC). Spectral amplifications, ranging from a factor of 2–6 are found to vary with frequency at different places. Significant amplification is found at four sites within the Latur region, at Basavakalyan, Kasgi, Killari, and Mudgad Eakoji villages. Our results show a positive correlation between the site amplification and the damage pattern in area. The pattern and the nature of the site amplification estimated in the present study corroborates also with the analytical models and the borehole data indicating alternating layers of unconsolidated sediments and basaltic rocks. |
| Keywords: | Site amplification Spectral ratios Latur region Killari earthquake |
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