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Science ; 351(6269): aac8353, 2016 Jan 08.
Article de Anglais | MEDLINE | ID: mdl-26676355

RÉSUMÉ

The Gorkha earthquake (magnitude 7.8) on 25 April 2015 and later aftershocks struck South Asia, killing ~9000 people 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 4312 coseismic and postseismic landslides. We also surveyed 491 glacier lakes for earthquake damage but found only nine 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.


Sujet(s)
Catastrophes/prévention et contrôle , Tremblements de terre/mortalité , Surveillance de l'environnement/méthodes , Glissements de terrain/mortalité , Gestion de la sécurité/méthodes , Inondations , Humains , Lacs , Népal , Imagerie satellitaire
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