Abstract
THE Koyna earthquake of December 11, 1967, killed about 200 people and injured a few thousand. The eipcentre was within 5 km of the Koyna Dam (17° 23′ N., 73° 45′ E.). A magnitude of the order of 7.5 on the Richter scale has been reported by the Indian Meteorological Department and the Central Water and Power Research Station. The depth of focus of the earthquake has been estimated at about 30 km. The earthquake was felt over distances up to 700 km from the epicentre. Geologists, basing their opinion on this information, have suggested that the earthquake resulted from movements along a fault, possibly a satellite of the principal fault along the Malabar coast, and that it may be an isolated event unconnected with the reservoir and the earlier seismic activity.
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References
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NARAIN, H., GUPTA, H. Koyna Earthquake. Nature 217, 1138–1139 (1968). https://doi.org/10.1038/2171138a0
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DOI: https://doi.org/10.1038/2171138a0
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