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Crustal structure of the Peninsular India

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Summary

Earthquake parameters for the forty aftershocks of the main Koyna earthquake of 10 December, 1967, have been determined. Depths of the foci of the earthquakes have been found to vary between 2 to 17 km. The velocities for the phasesP g,P *,P n have been observed to be 5.78±0.00, 6.58±0.04, 8.19±0.02 km/sec, and forS g,S *,S n to be 3.42±0.00, 3.92±0.01 and 4.62±0.01 km/sec respectively. A two-layered crustal model has been interpreted for the Peninsular shield with the average thickness of the granitic layer as 20 km and that for the basaltic layer as 18.7 km. A plot of the epicenters suggests a NNE to SSW orientation of the fault.

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Authors and Affiliations

  1. Scismological Observatory, Meteorological Office, Lodi Road, New Delhi-3, India

    H. M. Chaudhury

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  1. R. K. Dube
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  2. J. C. Bhayana
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  3. H. M. Chaudhury
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Dube, R.K., Bhayana, J.C. & Chaudhury, H.M. Crustal structure of the Peninsular India. PAGEOPH 109, 1718–1727 (1973). https://doi.org/10.1007/BF00876097

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