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Geological structures control on earthquake ruptures: The Mw7.7, 2013, Balochistan earthquake, Pakistan / A. Vallage in Geophysical research letters, vol 43 n° 19 (15 October 2016)  

Public [article]  inGeophysical research letters > vol 43 n° 19 (15 October 2016) . - pp 10155 - 10163 Titre : Geological structures control on earthquake ruptures: The Mw7.7, 2013, Balochistan earthquake, Pakistan Type de document : Article/Communication Auteurs : A. Vallage, Auteur ; Yann Klinger, Auteur ; R. Lacassin, Auteur ; Arthur Delorme, Auteur ; Marc Pierrot-Deseilligny , Auteur Année de publication : 2016 Article en page(s) : pp 10155 - 10163 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes IGN] déformation verticale de la croute terrestre [Termes IGN] Pakistan [Termes IGN] séisme [Termes IGN] structure géologique [Termes IGN] subduction Résumé : (auteur) The 2013 Mw7.7 Balochistan earthquake, Pakistan, ruptured the Hoshab fault. Left‐lateral motion dominated the deformation pattern, although significant vertical motion is found along the southern part of the rupture. Correlation of high‐resolution (2.5 m) optical satellite images provided horizontal displacement along the entire rupture. In parallel, we mapped the ground rupture geometry at 1:500 scale. We show that the azimuth of the ground rupture distributes mainly between two directions, N216° and N259°. The direction N216° matches the direction of preexisting geologic structures resulting from penetrative deformation caused by the nearby Makran subduction. Hence, during a significant part of its rupture, the 2013 Balochistan rupture kept switching between a long‐term fault front and secondary branches, in which existence and direction are related to the compressional context. It shows unambiguous direct interactions between different preexisting geologic structures, regional stress, and dynamic‐rupture stress, which controlled earthquake propagation path. Numéro de notice : A2016--179 Affiliation des auteurs : LASTIG MATIS+Ext (2012-2019) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1002/2016GL070418 Date de publication en ligne : 09/10/2016 En ligne : https://doi.org/10.1002/2016GL070418 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=91807 [article]