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Garhwal Himalaya; maximum credible earthquake; site amplification; spectral acceleration; attenuation relation.

In this paper, we present a seismic hazard scenario for the Garhwal region of the north-western Himalayan range, in terms of the horizontal Peak Ground Acceleration. The scenario earthquake of moment magnitude $M_w$ 8.5 has a 10% exceedance probability over the next 50 years. These estimates, the first for the region, were calculated through a stepwise process based on:

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Sankar Kumar Nath¹ Khemraj Shukla¹ Madhav Vyas²

1. Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur 721 302, India.
2. Schlumberger Limited, Houston, Texas 77077, USA.

Published

November 2008

Manuscript received

11 September 2007

Manuscript revised

4 January 2008

Accepted

27 March 2008