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

P. L. Narula ¹, Ravi Shanker ¹, S. Chopra ¹

Affiliations
1 Geological Survey of India, IN

Abstract

Chamoli earthquake of 29 March, 1999 (m_b 6.8) has caused extensive damage to life and property. Macroseismic surveys conducted around Chamoli have indicated maximum intensity of VIII on MSK scale. The epicentral tract of this event is oriented in the E-W direction. The aftershocks for the first few days are concentrated in an area of 40 km x 30 km which is bound by MCT in the north and the Alkananda Fault in the south. The authors have suggested a source model of this event on the basis of data generated as well as the seismotectonic setting of the area and have surmised that this event nucleated at the intersection of a transverse fault and the rupture propagated towards west along the detachment surface.

Keywords

Chamoli Earthquake, Seismotectonics, Seismicity in Garhwal, Source Mechanism, Source Dimension, Source Model.

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M. Ramakrishnan ¹, B. K. Rastogi ², P. L. Narula ³, V. P. Kamble ⁴, G. D. Gupta ⁵

Affiliations
1 Geological Survey of India, Hyderabad, IN
2 National Geophysical Res Inst, Hyderabad, IN
3 Geological Survey of India, Lucknow, IN
4 India Meteorological Dept., New Delhi, IN
5 Dept. of Science and Technology, New Delhi, IN

Abstract

No Abstract.

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