DOI: 10.1002/2016GL067907
论文题名: Coseismic and early postseismic deformation due to the 25 April 2015, Mw 7.8 Gorkha, Nepal, earthquake from InSAR and GPS measurements
作者: Sreejith K.M. ; Sunil P.S. ; Agrawal R. ; Saji A.P. ; Ramesh D.S. ; Rajawat A.S.
刊名: Geophysical Research Letters
ISSN: 0094-9173
EISSN: 1944-8904
出版年: 2016
卷: 43, 期: 7 起始页码: 3160
结束页码: 3168
语种: 英语
英文关键词: 25 April 2015
; coseismic and postseismic deformation
; Gorkha
; midcrustal ramp
; Nepal earthquake
; slip model
Scopus关键词: Deformation
; Earthquakes
; Geophysics
; Global positioning system
; Tectonics
; 25 April 2015
; Gorkha
; Midcrustal ramp
; Postseismic deformation
; Slip model
; Synthetic aperture radar
英文摘要: Analysis of Interferometric Synthetic Aperture Radar (InSAR) and Global Positioning System (GPS) data reveals coseismic and early postseismic (4-88 days) surface displacements associated with the 25 April 2015, Mw 7.8 Gorkha, Nepal, earthquake. The pattern of early postseismic surface uplift and subsidence is found to be opposite to that of the coseismic motion. InSAR and GPS data were jointly inverted for coseismic and postseismic slip on the Main Himalayan Thrust (MHT). We consider a complex ramp-flat-ramp-flat subsurface structure of the MHT with four connected fault planes dipping toward north from the Main Frontal Thrust (MFT). The inverted coseismic slip distribution follows an elliptical pattern, extending east-southeastward from the hypocenter with maximum amplitude of 5.7 m above the upper edge of the midcrustal ramp. We infer early postseismic afterslip (4-16 days) of 0.2-0.47 m toward downdip of the coseismic slip asperity and another patch with 0.1-0.2 m slip toward east. The shallow portion of the MHT toward south is found to have remained unruptured during the earthquake, nor did it slip aseismically after the earthquake, suggesting possibility of large events in the future. © 2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84979468921&doi=10.1002%2f2016GL067907&partnerID=40&md5=ac09d5af36f8a41e6eaa1b58be977b8e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10136
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Geosciences Division, Space Applications Center (ISRO), Ahmedabad, India
Recommended Citation:
Sreejith K.M.,Sunil P.S.,Agrawal R.,et al. Coseismic and early postseismic deformation due to the 25 April 2015, Mw 7.8 Gorkha, Nepal, earthquake from InSAR and GPS measurements[J]. Geophysical Research Letters,2016-01-01,43(7).