Educational Research and Reviews

  • Abbreviation: Educ. Res. Rev.
  • Language: English
  • ISSN: 1990-3839
  • DOI: 10.5897/ERR
  • Start Year: 2006
  • Published Articles: 2009

Review

Upper mantle velocity structure in the NW Himalaya: Hindu Kush to Garhwal region from travel time studies of deep Hindu Kush earthquakes

  Sushil Kumar1*, R. Chander 2 and K. N. Khattri 3
  1Scientist (Seismologist), Wadia Institute of Himalayan Geology, P.B.No.74, Dehra Dun –248 001(UA), India.  2I.I.T. Roorkee, Roorkee, formerly University of Roorkee), 290, Sector 4, Mansadevi complex, Panchkula – 134109, Haryana, India.  3I.I.T. Roorkee, Roorkee, formerly University of Roorkee), 100 Rajender Nagar, Dehra Dun-248001 (UA) India. 
Email: [email protected]

  •  Accepted: 27 September 2007
  •  Published: 30 December 2007

Abstract

 

The 22 Hindu Kush earthquakes had focal depths in the range of 50 to 245 km approximately. The 154 P 
travel time readings obtained from them were interpreted using a computer program based on least 
squared inversion and written specifically for the purpose. The upper mantle P-wave velocity along the 
north-west Himalaya obtained from this study has a value of 8.1 km/s. It appear to persist up to a depth 
of about 100 km below that level, it appears to increase to 8.35 km/s. The upper mantle P-wave velocity 
is found to be comparable to that obtained along a DSS profile in Kashmir. However, it is lower by 0.35 
km/s from the value estimated by Ni and Barazangi in 1982

 

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This article is published under the terms of the Creative Commons Attribution License 4.0

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