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Interseismic Strain Accumulation on the Himalayan Crustal Ramp (Nepal)

Pandey, M. R. and Tandukar, R. P. and Avouac, J. P. and Lavé, J. and Massot, J. P. (1995) Interseismic Strain Accumulation on the Himalayan Crustal Ramp (Nepal). Geophysical Research Letters, 22 (7). pp. 751-754. ISSN 0094-8276. doi:10.1029/94GL02971.

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The Departement of Mines and Geology has been monitoring the seismicity of the Central Himalayas of Nepal since 1985. Intense microseismicity and frequent medium‐size earthquakes (mL<4) tend to cluster beneath the topographic front of the Higher Himalaya. This 10–20km deep seismicity also correlates with a zone of localized uplift that has been evidenced from geodetic data. Both microseismic and geodetic data indicate strain accumulation on a mid‐crustal ramp that had been previously inferred from geological and geophysical evidence. This ramp connects a flat decollement under the Lesser and Sub‐Himalaya with a deeper decollement under the Higher Himalaya, and probably acts as a geometric asperity where strain and stress build up during the interseismic period. The large Himalayan earthquakes could nucleate there and probably activate the whole flat‐and‐ramp system up to the blind thrusts of the Sub‐Himalaya.

Item Type:Article
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URLURL TypeDescription 10.1029/94GL02971 DOIUNSPECIFIED
Avouac, J. P.0000-0002-3060-8442
Additional Information:© 1995 American Geophysical Union. Received 9 September 1994; accepted 10 October 1994. We thank the technical teams at the LDG and DMG for installation and careful maintenance of the nepalese seismic network. Francis Guillois drafted the Figures. We thank Roger Bilham for comments, Robin Lacassin and one anonymous reviewer for useful reviews.
Group:Seismological Laboratory
Issue or Number:7
Record Number:CaltechAUTHORS:20120910-135400575
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Official Citation:Pandey, M. R., R. P. Tandukar, J. P. Avouac, J. Lavé, and J. P. Massot (1995), Interseismic strain accumulation on the Himalayan crustal ramp (Nepal), Geophys. Res. Lett., 22(7), 751–754, doi:10.1029/94GL02971.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:33970
Deposited On:12 Sep 2012 17:44
Last Modified:09 Nov 2021 23:05

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