DOI: 10.1002/2015GL066044
论文题名: Rupture process of the Mw = 7.9 2015 Gorkha earthquake (Nepal): Insights into Himalayan megathrust segmentation
作者: Grandin R. ; Vallée M. ; Satriano C. ; Lacassin R. ; Klinger Y. ; Simoes M. ; Bollinger L.
刊名: Geophysical Research Letters
ISSN: 0094-9305
EISSN: 1944-9036
出版年: 2015
卷: 42, 期: 20 起始页码: 8373
结束页码: 8382
语种: 英语
英文关键词: back projection
; earthquake
; Himalaya
; interseismic coupling
; kinematic inversion
; rupture process
Scopus关键词: Earthquakes
; Geophysics
; Kinematics
; Back projection
; High-frequency radiation
; Himalayas
; Kinematic inversion
; Main himalayan thrusts
; Peak ground acceleration
; Rupture process
; Structural architecture
; Synthetic aperture radar
; coseismic process
; earthquake event
; earthquake magnitude
; earthquake rupture
; GPS
; kinematics
; peak acceleration
; segmentation
; slip
; strong motion
; synthetic aperture radar
; teleseismic wave
; thrust
; Bagmati
; Himalayas
; Kathmandu
; Nepal
英文摘要: We investigate the rupture process of the 25 April 2015 Gorkha earthquake (Mw = 7.9) using a kinematic joint inversion of teleseismic waves, strong motion data, high-rate GPS, static GPS, and synthetic aperture radar (SAR) data. The rupture is found to be simple in terms of coseismic slip and even more in terms of rupture velocity, as both inversion results and a complementing back projection analysis show that the main slip patch broke unilaterally at a steady velocity of 3.1-3.3 km/s. This feature likely contributes to the moderate peak ground acceleration (0.2 g) observed in Kathmandu. The ~15 km deep rupture occurs along the base of the coupled portion of the Main Himalayan Thrust and does not break the area ranging from Kathmandu to the front. The limitation in length and width of the rupture cannot be identified in the preearthquake interseismic coupling distribution and is therefore discussed in light of the structural architecture of the megathrust. Key Points Uniform rupture velocity during peak moment release explains modest acceleration in Kathmandu High-frequency radiation occurred preferentially along the downdip edge of the high slip patch The MHT is locked updip of the 2015 event, suggesting high level of seismic hazard toward the front © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84946593105&doi=10.1002%2f2015GL066044&partnerID=40&md5=02ff42248b6b9a44d7ecda3b4e48f46b
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8921
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: Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Université Paris Diderot, Paris, France
Recommended Citation:
Grandin R.,Vallée M.,Satriano C.,et al. Rupture process of the Mw = 7.9 2015 Gorkha earthquake (Nepal): Insights into Himalayan megathrust segmentation[J]. Geophysical Research Letters,2015-01-01,42(20).