DOI: 10.1002/2016GL069755
论文题名: Tectonic tremor on Vancouver Island, Cascadia, modulated by the body and surface waves of the Mw 8.6 and 8.2, 2012 East Indian Ocean earthquakes
作者: Kundu B. ; Ghosh A. ; Mendoza M. ; Bürgmann R. ; Gahalaut V.K. ; Saikia D.
刊名: Geophysical Research Letters
ISSN: 0094-8665
EISSN: 1944-8396
出版年: 2016
卷: 43, 期: 17 起始页码: 9009
结束页码: 9017
语种: 英语
英文关键词: Cascadia
; East Indian Ocean earthquake
; tremor
; Vancouver Island
Scopus关键词: Geophysics
; Modulation
; Seismic waves
; Surface waves
; Tectonics
; Water waves
; Cascadia
; Cascadia subduction zone
; Dynamic modulation
; East indian oceans
; Strike-slip events
; Teleseismic events
; Tremor
; Vancouver Island
; Earthquakes
; amplitude
; background level
; body wave
; earthquake event
; earthquake magnitude
; microtremor
; stress change
; strike-slip fault
; surface wave
; teleseismic wave
; wave generation
; British Columbia
; Canada
; Cascadia Subduction Zone
; Indian Ocean
; Indian Ocean (East)
; Pacific Ocean
; Vancouver Island
英文摘要: The 2012 East Indian Ocean earthquake (Mw 8.6), so far the largest intraoceanic plate strike-slip event ever recorded, modulated tectonic tremors in the Cascadia subduction zone. The rate of tremor activity near Vancouver Island increased by about 1.5 times from its background level during the passage of seismic waves of this earthquake. In most cases of dynamic modulation, large-amplitude and long-period surface waves stimulate tremors. However, in this case even the small stress change caused by body waves generated by the 2012 earthquake modulated tremor activity. The tremor modulation continued during the passage of the surface waves, subsequent to which the tremor activity returned to background rates. Similar tremor modulation is observed during the passage of the teleseismic waves from the Mw 8.2 event, which occurs about 2 h later near the Mw 8.6 event. We show that dynamic stresses from back-to-back large teleseismic events can strongly influence tremor sources. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84987707804&doi=10.1002%2f2016GL069755&partnerID=40&md5=4e67395bca01a8d16f6c977147c13fc6
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9628
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: Department of Earth and Atmospheric Sciences, NIT Rourkela, Rourkela, India
Recommended Citation:
Kundu B.,Ghosh A.,Mendoza M.,et al. Tectonic tremor on Vancouver Island, Cascadia, modulated by the body and surface waves of the Mw 8.6 and 8.2, 2012 East Indian Ocean earthquakes[J]. Geophysical Research Letters,2016-01-01,43(17).