Temporal-Spatial Distribution of Post-Seismic Afterslip Associated with the 2015 MW 7.9 Nepal Earthquake
Abstract Based on elastic dislocation theory, we use principal component analysis-based inversion method (PCAIM) and 531-day data from 16 GPS stations to study the temporal and spatial variation characteristics of fault slip after 2015 MW7.9 Nepal earthquake. The results show that (1) the post-seismic afterslip obeys logarithmic decay patterns; (2) the fault slip is mainly concentrated in the northern part of the mainshock rupture zone, with the maximum slip of 20.6 cm located at 26.7 km depth; (3) the inverted seismic moment is 3.36×1 020 N·m, equivalent to a moment magnitude (MW) of 7.6.
Key words :
Nepal earthquake
GPS coordinate time series
PCAIM
post-seismic deformation
afterslip
Cite this article:
YANG Zhongrong,YUAN Linguo,JIANG Zhongshan et al. Temporal-Spatial Distribution of Post-Seismic Afterslip Associated with the 2015 MW 7.9 Nepal Earthquake[J]. jgg, 2018, 38(9): 891-896.
YANG Zhongrong,YUAN Linguo,JIANG Zhongshan et al. Temporal-Spatial Distribution of Post-Seismic Afterslip Associated with the 2015 MW 7.9 Nepal Earthquake[J]. jgg, 2018, 38(9): 891-896.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2018/V38/I9/891
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