Abstract

Attenuation properties of the crust around Garhwal seismic zone are studied by estimating the frequency dependent Qa and Qb using extended coda normalization method. Seven local earthquakes have been used for this purpose. The mean values of Qa and Qb show a dependence on frequency in the Garhwal region. The average frequency dependent relationships(Q=Q0fn) estimated for the region are: Qa =37f1.06 and Qb=63f1.03. The estimates of attenuation parameters obtained in the present study are found to be consistent with the similar relationships obtained for other regions. The outcome of this study is useful in estimating the seismic hazard of the region.