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2015
  • Non-ICIMOD publication

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Geomorphic and Geologic Controls of Geohazards Induced by Nepals 2015 Gorkha Earthquake

  • Kargel, J. S.
  • Leonard, G. J.
  • Shugar, D. H.
  • Haritashya, U. K.
  • Bevington, A.
  • Fielding, E. J.
  • Fujita, K.
  • Geertsema, M.
  • Miles, E. S.
  • Steiner, J.
  • Anderson, E.
  • Bajracharya, S.
  • Bawden, G. W.
  • Breashears, D. F.
  • Byers, A.
  • Collins, B.
  • Dhital, M. R.
  • Donnellan, A.
  • Evans, T. L.
  • Geai, M. L.
  • Glasscoe, M. T.
  • Green, D.
  • Gurung, D. R.
  • Heijenk, R.
  • Hilborn, A.
  • Hudnut, K.
  • Huyck, C.
  • Immerzeel, W. W.
  • Jiang, L.
  • Jibson, R.
  • Kaab, A.
  • Khanal, N. R.
  • Kirschbaum, D.
  • Kraaijenbrink, P. D. A.
  • Lamsal, D.
  • Liu, S.
  • Lv, M.
  • Mckinney, D.
  • Nahirnick, N. K.
  • Nan, Z.
  • Ojha, S.
  • Olsenholler, J.
  • Painter, T. H.
  • Pleasants, M.
  • Kc, P.
  • Yuan, Q.
  • Raup, B. H.
  • Regmi, D.
  • Rounce, D. R.
  • Sakai, A.
  • Shangguan, D.
  • Shea, J. M.
  • Shrestha, A. B.
  • Shukla, A.
  • Stumm, D.
  • Van Der Kooij, M.
  • Voss, K.
  • Wang, X.
  • Weihs, B.
  • Wolfe, D.
  • Wu, L.
  • Yao, X.
  • Yoder, M. R.
  • Young, N.
  • Summary

The Gorkha earthquake (M 7.8) on 25 April 2015 and later aftershocks struck South Asia, killing ~9,000 and damaging a large region. Supported by a large campaign of responsive satellite data acquisitions over the earthquake disaster zone, our team undertook a satellite image survey of the earthquakes’ induced geohazards in Nepal and China and an assessment of the geomorphic, tectonic, and lithologic controls on quake-induced landslides. Timely analysis and communication aided response and recovery and informed decision makers. We mapped 4,312 co-seismic and post-seismic landslides. We also surveyed 491 glacier lakes for earthquake damage, but found only 9 landslide-impacted lakes and no visible satellite evidence of outbursts. Landslide densities correlate with slope, peak ground acceleration, surface downdrop, and specific metamorphic lithologies and large plutonic intrusions.

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