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Geomorphic and geologic controls of geohazards induced by Nepal's 2015 Gorkha earthquake

journal contribution
posted on 2023-05-18, 17:31 authored by Kargel, JS, Leonard, GJ, Shugar, DH, Haritashya, UK, Bevington, A, Fielding, EJ, Fujita, K, Geertsema, M, Miles, ES, Steiner, J, Anderson, E, Bajracharya, S, Bawden, GW, Breashears, DF, Byers, A, Collins, B, Dhital, MR, Donnellan, A, Evans, TL, Geai, ML, Glasscoe, MT, Green, D, Gurung, DR, Heijenk, R, Hilborn, A, Hudnut, K, Huyck, C, Immerzeel, WW, Liming, J, Jibson, R, Kaab, A, Khanal, NR, Kirschbaum, D, Kraaijenbrink, PDA, Lamsal, D, Shiyin, L, Mingyang, L, McKinney, D, Nahirnick, NK, Zhuotong, N, Ojha, S, Olsenholler, J, Painter, TH, Pleasants, M, Pratima, KC, Yuan, QI, Raup, BH, Regmi, D, Rounce, DR, Sakai, A, Donghui, S, Shea, JM, Shrestha, AB, Shukla, A, Stumm, D, Van der Kooij, M, Voss, K, Xin, W, Weihs, B, Wolfe, D, Lizong, W, Xiaojun, Y, Yoder, MR, Neal YoungNeal Young
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.

History

Publication title

Science

Volume

351

Issue

6269

Article number

8353

Number

8353

Pagination

1-12

ISSN

0036-8075

Department/School

Institute for Marine and Antarctic Studies

Publisher

Amer Assoc Advancement Science

Place of publication

1200 New York Ave, Nw, Washington, USA, Dc, 20005

Rights statement

© 2016 American Association for the Advancement of Science. All rights Reserved.

Repository Status

  • Restricted

Socio-economic Objectives

Natural hazards not elsewhere classified

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