Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

B. S. Sukhija ¹, M. N. Rao ¹, D. V. Reddy ¹, P. Nagabhushanam ¹, B. V. Lakshmi ¹, H. K. Gupta ¹

Affiliations
1 National Geophysical Research Institute, Hyderabad-500 007, IN

Abstract

Paleoseismic investigations so far carried out in India are spread over two tectonically distinct areas, viz., the interplate seismic zone of Himalaya and the intraplate Stable Continental Region (SCR). Most of the reported paleoseismicity studies provided geological evidences like soft sediment deformation, paleoliquefaction features (like sand dykes, sand blows etc), small scale folding, faulting with disptacement of beds etc. Though the evaluation of recurrellce period of destructive seismic events is a pre-requisite for paleoseismology, no paleoseismic study in India so far has provided information on the recurrence period, except for the detailed study in the Shillong plateau, which suggested recurrence period of 400-600 yrs for major earthquakes.

Keywords

Paleoseismology, Earthquake Hazard, Recurrence Period, Himalaya, Stable Continental Region.

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H. K. Gupta ¹

Affiliations
1 National Geophys Res. Inst. Hyderabad, IN

Abstract

No Abstract.

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H. K. Gupta

Abstract

No Abstract.

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H. K. Gupta ¹, R. K. Chadha ¹, M. N. Rao ¹, B. L. Narayana ¹, P. Mandal ¹, M. Ravi Kumar ¹, N. Kumar ¹

Affiliations
1 National Geophysical Research Institute, Hyderabad - 560 007, IN

Abstract

The Jabalpur earthquake of magnitude 5.8 occurred on May 22, 1997 along seismically active Narmada-Son Lineament (NSL) in central India, with its epicenter about 30 km southeast of Jabalpur. A maximum intensity I_o = VIII on MM scale was observed in Jabalpur and surrounding region. The isoseismal map prepared for this earthquake shows NE-SW trend which in general agrees with the focal mechanism solution indicating thrust faulting along a ENE-WSW fault with minor strike-slip component. Several ground cracks mapped in meizoseismal area show a dominant N75° E trend. The damage pattern of the constructions clearly shows a strong correlation with lithology, structures and soil cover of the area. There are no foreshocks reported for this earthquake and only a few aftershocks are recorded. which warrant a close monitoring of this region.

Keywords

Earthquake, Seismology, Jabalpur.

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