DOI: 10.1002/2015GL064734
论文题名: Larger aftershocks happen farther away: Nonseparability of magnitude and spatial distributions of aftershocks
作者: Van Der Elst N.J. ; Shaw B.E.
刊名: Geophysical Research Letters
ISSN: 0094-9514
EISSN: 1944-9245
出版年: 2015
卷: 42, 期: 14 起始页码: 5771
结束页码: 5778
语种: 英语
英文关键词: aftershock forecasting
; aftershocks
; elastic rebound
; spatial clustering
; stress triggering
Scopus关键词: Faulting
; Geophysics
; Stress concentration
; Aftershock zones
; Aftershocks
; Double differences
; Earthquake catalogs
; Elastic rebound
; Initiating events
; Spatial clustering
; Stress triggering
; Earthquakes
; aftershock
; earthquake magnitude
; elastic modulus
; fault
; forecasting method
; rupture
; spatial distribution
; stress
英文摘要: Aftershocks may be driven by stress concentrations left by the main shock rupture or by elastic stress transfer to adjacent fault sections or strands. Aftershocks that occur within the initial rupture may be limited in size, because the scale of the stress concentrations should be smaller than the primary rupture itself. On the other hand, aftershocks that occur on adjacent fault segments outside the primary rupture may have no such size limitation. Here we use high-precision double-difference relocated earthquake catalogs to demonstrate that larger aftershocks occur farther away than smaller aftershocks, when measured from the centroid of early aftershock activity - a proxy for the initial rupture. Aftershocks as large as or larger than the initiating event nucleate almost exclusively in the outer regions of the aftershock zone. This observation is interpreted as a signature of elastic rebound in the earthquake catalog and can be used to improve forecasting of large aftershocks. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938962132&doi=10.1002%2f2015GL064734&partnerID=40&md5=a9e70db026a00af0a2d28066354f8112
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9129
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: U.S. Geological Survey Earthquake Science Center, Pasadena, CA, United States
Recommended Citation:
Van Der Elst N.J.,Shaw B.E.. Larger aftershocks happen farther away: Nonseparability of magnitude and spatial distributions of aftershocks[J]. Geophysical Research Letters,2015-01-01,42(14).