P-wave residuals at stations in Nepal - Evidence for a high velocity region beneath the Karakorum

Details P-wave residuals at stations in Nepal - Evidence for a high velocity region beneath the Karakorum P-wave residuals at stations in Nepal - Evidence for a high velocity region beneath the Karakorum

Oct 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18.1909p&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 18, Oct. 1991, p. 1909-1912.

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15

Earthquakes, P Waves, Seismic Waves, Himalayas, Nepal, Seismology, Wave Propagation

Scientific paper

P-wave residuals recorded at stations in Nepal from events to the northwest and closer than about 20 deg are consistently earlier than those from other directions by about 2.5 sec. These early arrivals are associated with paths confined to the upper 300 km of the earth and suggest that cold material occupies the uppermost mantle beneath the Karakorum, northwest Himalaya, and western Kunlun. Thus, these data suggest that convective downwelling occurs more vigorously in this region than beneath the rest of the Himalaya, Tibet, and their surroundings.

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