DOI: 10.1002/2014GL059942
论文题名: Fault reactivation due to the M7.6 Nicoya earthquake at the Turrialba-Iraz͡ volcanic complex, Costa Rica: Effects of dynamic stress triggering
作者: Lupi M. ; Fuchs F. ; Pacheco J.F.
刊名: Geophysical Research Letters
ISSN: 0094-10571
EISSN: 1944-10302
出版年: 2014
卷: 41, 期: 12 起始页码: 4142
结束页码: 4148
语种: 英语
Scopus关键词: Costa Rica
; Dynamic stress
; Fault reactivation
; Volcanic complex
; aftershock
; Caribbean plate
; earthquake magnitude
; earthquake swarm
; earthquake trigger
; interface
; island arc
; Nicoya earthquake 2012
; slip
; Cartago
; Costa Rica
; Irazu Volcano
; Turrialba
英文摘要: The M7.6 Nicoya earthquake struck at the interface between the Cocos plate and the Caribbean plate on 5 September 2012 inducing a ground acceleration of 0.5 m s-2 at the Iraz͡-Turrialba volcanic complex. We use data from six seismic stations deployed around and atop the Iraz͡-Turrialba volcanic complex to show the increase of local seismic activity after the M7.6 Nicoya earthquake. The response consists in more than 300 locatable earthquakes occurring in swarm sequences along a fault system that intersects the Iraz͡-Turrialba volcanic complex. In addition, we point out that major aftershocks are followed by increases of seismic activity in the same region. The weak static stress variation imposed by the main slip of the Nicoya earthquake at the Iraz͡-Turrialba volcanic complex suggests a dynamic triggering mechanism. We expand this concept suggesting that this behavior may be similar to the one observed in the Chilean and Japanese volcanic arcs during the M8.8 2010 Maule, Chile, and M9.0 2011 Tohoku, Japan, earthquakes. Finally, we highlight that the combined action of dynamic stress and short-lived coseismic relaxation may trigger seismic activity in geological systems in near-critical conditions. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84907947776&doi=10.1002%2f2014GL059942&partnerID=40&md5=a85a22c14541020db5994f1ff773142d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7835
Appears in Collections: 气候减缓与适应
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作者单位: Geological Institute, ETH Zurich, Zurich, Switzerland
Recommended Citation:
Lupi M.,Fuchs F.,Pacheco J.F.. Fault reactivation due to the M7.6 Nicoya earthquake at the Turrialba-Iraz͡ volcanic complex, Costa Rica: Effects of dynamic stress triggering[J]. Geophysical Research Letters,2014-01-01,41(12).