Abstract
A mildly damaging earthquake of magnitude 4.5 and intensity VI occurred 20 km east of the Idukki reservoir, Kerala in southern India. With a network of 5 seismic stations, the aftershocks which continued for 3 1/2 months were monitored. The hypocentral parameters, b value, M 1/M 0 ratio indicate that this earthquake sequence does not qualify to be categorized as induced. The trend of the aftershocks, composite fault plane solution and local tectonics point towards reactivation of a NW-SE fault along the Kallar river. The existence of such a fault is also supported by gravity studies.
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© 1995 Birkhäuser Verlag, Basel
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Rastogi, B.K., Chadha, R.K., Sarma, C.S.P. (1995). Investigations of June 7, 1988 Earthquake of Magnitude 4.5 near Idukki Dam in Southern India. In: Gupta, H.K., Chadha, R.K. (eds) Induced Seismicity. Pageoph Topical Volumes. Birkhäuser Basel. https://doi.org/10.1007/978-3-0348-9238-4_9
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DOI: https://doi.org/10.1007/978-3-0348-9238-4_9
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