DOI: 10.1007/s00531-016-1389-x
Scopus记录号: 2-s2.0-84986269620
论文题名: Stress history controls the spatial pattern of aftershocks: case studies from strike-slip earthquakes
作者: Utkucu M. ; Durmuş H. ; Nalbant S.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2017
卷: 106, 期: 6 起始页码: 1841
结束页码: 1861
语种: 英语
英文关键词: Aftershock triggering
; Coulomb stress
; Eastern Turkey
; Imperial Valley
; Lut block
; Seismotectonics
Scopus关键词: aftershock
; earthquake event
; earthquake rupture
; earthquake trigger
; seismotectonics
; spatial distribution
; stress field
; Imperial Valley
; Iran
; Lut Block
; Turkey
英文摘要:
Earthquake ruptures perturb stress within the surrounding crustal volume and as it is widely accepted now these stress perturbations strongly correlates with the following seismicity. Here we have documented five cases of the mainshock–aftershock sequences generated by the strike-slip faults from different tectonic environments of world in order to demonstrate that the stress changes resulting from large preceding earthquakes decades before effect spatial distribution of the aftershocks of the current mainshocks. The studied mainshock–aftershock sequences are the 15 October 1979 Imperial Valley earthquake (Mw = 6.4) in southern California, the 27 November 1979 Khuli-Boniabad (Mw = 7.1), the 10 May 1997 Qa’enat (Mw = 7.2) and the 31 March 2006 Silakhor (Mw = 6.1) earthquakes in Iran and the 13 March 1992 Erzincan earthquake (Mw = 6.7) in Turkey. In the literature, we have been able to find only these mainshocks that are mainly characterized by dense and strong aftershock activities along and beyond the one end of their ruptures while rare aftershock occurrences with relatively lower magnitude reported for the other end of their ruptures. It is shown that the stress changes resulted from earlier mainshock(s) that are close in both time and space might be the reason behind the observed aftershock patterns. The largest aftershocks of the mainshocks studied tend to occur inside the stress-increased lobes that were also stressed by the background earthquakes and not to occur inside the stress-increased lobes that fall into the stress shadow of the background earthquakes. We suggest that the stress shadows of the previous mainshocks may persist in the crust for decades to suppress aftershock distribution of the current mainshocks. Considering active researches about use of the Coulomb stress change maps as a practical tool to forecast spatial distribution of the upcoming aftershocks for earthquake risk mitigation purposes in near-real time, it is further suggested that the background mainshocks along the neighbouring faults should be taken into account in producing the stress change maps for commenting on aftershock occurrences. © 2016, Springer-Verlag Berlin Heidelberg.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84986269620&doi=10.1007%2fs00531-016-1389-x&partnerID=40&md5=80fd5a3c65335168ed1939f22dc70e53
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69994
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Department of Geophysics, Faculty of Engineering, Sakarya University, Esentepe Campus, Serdivan, Sakarya, Turkey; Department of Geological Engineering, Faculty of Engineering, Dumlupınar University, Kutahya, Turkey; School of Environmental Sciences, University of Ulster, Coleraine, United Kingdom
Recommended Citation:
Utkucu M.,Durmuş H.,Nalbant S.. Stress history controls the spatial pattern of aftershocks: case studies from strike-slip earthquakes[J]. International Journal of Earth Sciences,2017-01-01,106(6)