Journal of Asian Earth Sciences 156 (2018) 1–10 Contents lists available at ScienceDirect Journal of Asian Earth Sciences journal homepage: www.elsevier.com/locate/jseaes Postseismic deformation associated with the 2015 Mw 7.8 Gorkha earthquake, Nepal: Investigating ongoing afterslip and constraining crustal rheology Zhongshan Jiang, Linguo Yuan, Dingfa Huang , Zhongrong Yang, Abubakr Hassan Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, China ARTICLE I NFO ABSTRACT Keywords: The 2015 Mw 7.8 Gorkha earthquake has not only imposed eﬀective constraints on the geometrical structures, Gorkha earthquake friction behaviours and seismogenic patterns of the Nepal Himalaya thrust systems but has also provided va- Postseismic deformation luable insights into the uplift mechanism and lithosphere rheology of the Tibetan Plateau. Here, ∼1.6-year GPS Afterslip observations are used to reveal the postseismic deformation characteristics following the Gorkha earthquake, Viscoelastic relaxation investigate the ongoing aseismic afterslip on the Main Himalayan Thrust (MHT) fault and constrain the crustal Seismic hazard rheology of the Southern Tibetan Plateau. First, afterslip is considered to be solely responsible for the postseismic deformation (afterslip-only model). The results show that afterslip is anticorrelated with peak coseismic slip areas. One high-afterslip-concentration area, with a peak of ∼24 cm, is distributed downdip of the
Journal of Asian Earth Sciences – Elsevier
Published: May 1, 2018
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