Volume 27 Sp

Volume 26

Volume 25 Sp

One dimensional seismic velocity structure beneath Western Nepal

S. Rajaure

National Seismological Centre, Department of Mines and Geology

Lainchaur, Kathmandu, Nepal

(E-mail: srajaure@infoclub.com.np)

ABSTRACT

An attempt has been made to study the velocity structure of western Nepal. Arrival time data of local earthquakes occurring in that region were used to derive the model. A three layered velocity model both for the P- as well as S-wave velocity has been estimated. The compressional wave velocities in the first, second and the third layers have been estimated to be

5.53 km/sec, 6.29 km/sec and 8.13 km/sec respectively. Similarly the corresponding S-wave velocities are 3.18, 3.62, 4.66 km/sec respectively. The model for the Western Nepal and that for the Centre-East Nepal are almost same. The crust and the mantle beneath west and centre-east are homogeneous.

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