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A study of the crustal structure beneath the Himalayas from body waves

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Summary

The crustal structure beneath the Himalayas has been investigated using body wave data from near earthquakes having epicentres over the Himalayas and recorded by the observatories situated over, or very near, the foothills of the mountains. A three-layered crustal model, without the top sedimentary layer, with velocities for theP wave group in Granite I, Granite II and the Basaltic layer as 5.48, 6.00 and 6.45 and for theS wave group as 3.33, 3.56 and 3.90 km/sec respectively, has been interpreted. The upper mantle velocity for theP wave has been observed to be 8.07 km/sec and for theS wave as 4.57 km/sec. Average thickness for the Granite I layer has been computed as 22.7 km, for the Granite II layer as 16.3 km and for the Basaltic layer as 18.7 km. Crustal and sub-crustal velocities indicate a lower trend under the mountain. A thicker crust has been obtained beneath the Himalayas.

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Authors and Affiliations

  1. Meteorological Department, Seismological Observatory, Lodi Road, New Delhi-3, India

    R. K. Dube

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  1. A. N. Tandon
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  2. R. K. Dube
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Tandon, A.N., Dube, R.K. A study of the crustal structure beneath the Himalayas from body waves. PAGEOPH 111, 2207–2215 (1973). https://doi.org/10.1007/BF00940871

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  • DOI: https://doi.org/10.1007/BF00940871

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