DOI: 10.1002/2014GL061219
论文题名: Foreshock activity related to enhanced aftershock production
作者: Marsan D. ; Helmstetter A. ; Bouchon M. ; Dublanchet P.
刊名: Geophysical Research Letters
ISSN: 0094-9763
EISSN: 1944-9494
出版年: 2014
卷: 41, 期: 19 起始页码: 6652
结束页码: 6658
语种: 英语
英文关键词: aftershocks
; aseismic slip
; earthquakes
; nucleation phase
Scopus关键词: Deformation
; Nucleation
; Aftershock zones
; Aftershocks
; Aseismic slip
; Earthquake clustering
; Large earthquakes
; Positive correlations
; Slow deformation
; Transient deformation
; Earthquakes
; acceleration
; aftershock
; creep
; deformation
; earthquake intensity
; foreshock
; rupture
; seismicity
; slip rate
英文摘要: Foreshock activity sometimes precedes the occurrence of large earthquakes, but the nature of this seismicity is still debated, and whether it marks transient deformation and/or slip nucleation is still unclear. We here study at the worldwide scale how foreshock occurrence affects the postseismic phase and find a significant positive correlation between foreshock and aftershock activities: earthquakes preceded by accelerating seismicity rates produce 40% more aftershocks on average, and the length of the aftershock zone after 20 days is 20% larger. These observations cannot be reproduced by standard earthquake clustering models that predict the accelerating pattern of foreshock occurrence but not its impact on aftershock activity. This strongly suggests that slow deformation transients, possibly related to episodic creep, could initiate prior to the main shock and extend past the coseismic phase, resulting in compound ruptures that include a very long period (up to tens of days) component. Key Points Foreshocks lead to enhanced aftershock productionAseismic slip before and after the main shock is a likely cause ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911459622&doi=10.1002%2f2014GL061219&partnerID=40&md5=32d48c7de3a66b64a495b6d1d08abaa7
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7027
Appears in Collections: 气候减缓与适应
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作者单位: ISTerre, Université de Savoie, CNRS, Le Bourget du Lac, France
Recommended Citation:
Marsan D.,Helmstetter A.,Bouchon M.,et al. Foreshock activity related to enhanced aftershock production[J]. Geophysical Research Letters,2014-01-01,41(19).