DOI: 10.1002/2016GL068843
论文题名: Two-stage composite megathrust rupture of the 2015 Mw8.4 Illapel, Chile, earthquake identified by spectral-element inversion of teleseismic waves
作者: Lee S.-J. ; Yeh T.-Y. ; Lin T.-C. ; Lin Y.-Y. ; Song T.-R.A. ; Huang B.-S.
刊名: Geophysical Research Letters
ISSN: 0094-9540
EISSN: 1944-9271
出版年: 2016
卷: 43, 期: 10 起始页码: 4979
结束页码: 4985
语种: 英语
英文关键词: 2015 Illapel earthquake
; seismic wave propagation
; source rupture process
; subduction zone
; two-stage megathrust
Scopus关键词: Geophysics
; Seismic waves
; Seismology
; Wave propagation
; Earthquake physics
; Megathrust
; Moment magnitudes
; Source rupture process
; Spatial temporals
; Spectral element
; Subduction zones
; Teleseismic waves
; Earthquakes
; composite
; earthquake event
; earthquake rupture
; moment tensor
; slip rate
; subduction zone
; teleseismic wave
; thrust
; trench
; wave propagation
; Chile
; Peru
英文摘要: The Mw8.4 Illapel earthquake occurred on 16 September was the largest global event in 2015. This earthquake was not unexpected because the hypocenter was located in a seismic gap of the Peru-Chile subduction zone. However, the source model derived from 3-D spectral-element inversion of teleseismic waves reveals a distinct two-stage rupture process with completely different slip characteristics as a composite megathrust event. The two stages were temporally separated. Rupture in the first stage, with a moment magnitude of Mw8.32, built up energetically from the deeper locked zone and propagated in the updip direction toward the trench. Subsequently, the rupture of the second stage, with a magnitude of Mw8.08, mainly occurred in the shallow subduction zone with atypical repeating slip behavior. The unique spatial-temporal rupture evolution presented in this source model is key to further in-depth studies of earthquake physics and source dynamics in subduction systems. ©2016. The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84978920042&doi=10.1002%2f2016GL068843&partnerID=40&md5=170e985edc9131f9b74de460db8ffd9a
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10503
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: Institute of Earth Sciences, Academia Sinica, Taipei, Taiwan
Recommended Citation:
Lee S.-J.,Yeh T.-Y.,Lin T.-C.,et al. Two-stage composite megathrust rupture of the 2015 Mw8.4 Illapel, Chile, earthquake identified by spectral-element inversion of teleseismic waves[J]. Geophysical Research Letters,2016-01-01,43(10).