Two-stage composite megathrust rupture of the 2015 Mw8.4 Illapel, Chile, earthquake identified by spectral-element inversion of teleseismic waves

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Title:	Two-stage composite megathrust rupture of the 2015 Mw8.4 Illapel, Chile, earthquake identified by spectral-element inversion of teleseismic waves
Authors:	林彥宇;Lee, Shiann‐Jong;Yeh, Te‐Yang;Lin, Tzu‐Chi;Lin, Yen‐Yu;Song, Teh‐Ru Alex;Huang, Bor‐Shouh
Contributors:	地球科學學院地球科學學系
Keywords:	2015 Illapel earthquake;Depth;Direction;Dynamical systems;Dynamics;Earthquake construction;Earthquakes;Evolution;Identification;Physics;Rupture;Rupturing;Seismic activity;seismic wave propagation;Slip;source rupture process;Spectra;Subduction;Subduction (geology);subduction zone;Subduction zones;Three dimensional models;two‐stage megathrust
Date:	2016-01-01
Issue Date:	2026-04-23 11:50:14 (UTC+8)
Publisher:	Wiley-Blackwell;Washington: American Geophysical Union (AGU)
Abstract:	摘要： AbstractThe 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. 出版者： Washington: American Geophysical Union (AGU) 出版日期： 2016-05-28 出處： Geophysical Research Letters, 2016-05, Vol.43 (10), p.4979-4985 資源來源： Wiley Online Journals ** 版權： 2016. The Authors. 版權： 2016. American Geophysical Union. All Rights Reserved. 版權： 2016. This article is published under http://creativecommons.org/licenses/by-nc-nd/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. 識別號： ISSN: 0094-8276 識別號： ISSN: 1944-8007 識別號： EISSN: 1944-8007 識別號： DOI: 10.1002/2016gl068843
Appears in Collections:	[Department of Earth Sciences ] journal & Dissertation

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