| DOI: | 10.1002/2015GL066232
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| 论文题名: | Modeling aftershocks as a stretched exponential relaxation |
| 作者: | Mignan A.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8392
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| EISSN: | 1944-8123
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| 出版年: | 2015
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| 卷: | 42, 期:22 | | 起始页码: | 9726
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| 结束页码: | 9732
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| 语种: | 英语
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| 英文关键词: | aftershock
; data fitting
; meta-analysis
; Omori law
; power law
; stretched exponential
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| Scopus关键词: | Decay (organic)
; Relaxation processes
; Aftershock
; Data fittings
; Meta analysis
; Omori law
; Power-law
; Stretched exponential
; Earthquakes
; aftershock
; data acquisition
; earthquake catalogue
; meta-analysis
; numerical model
; power law
; temporal variation
; trend analysis
; California
; Taiwan
; United States
|
| 英文摘要: | The decay rate of aftershocks has been modeled as a power law since the pioneering work of Omori in the late nineteenth century. Although other expressions have been proposed in recent decades to describe the temporal behavior of aftershocks, the number of model comparisons remains limited. After reviewing the aftershock models published from the late nineteenth century until today, I solely compare the power law, pure exponential and stretched exponential expressions defined in their simplest forms. By applying statistical methods recommended recently in applied mathematics, I show that all aftershock sequences tested in three regional earthquake catalogs (Southern and Northern California, Taiwan) and with three declustering techniques (nearest-neighbor, second-order moment, window methods) follow a stretched exponential instead of a power law. These results infer that aftershocks are due to a simple relaxation process, in accordance with most other relaxation processes observed in Nature. Key Points Aftershocks are shown to follow a stretched exponential temporal decay instead of a power law This trend is observed for aftershock sequences defined from three different declustering techniques A stretched exponential law suggests that the crust behaves as a homogeneously disordered solid. © 2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84956924944&doi=10.1002%2f2015GL066232&partnerID=40&md5=8c3ba50fef3650d98624537388a0354f
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/8008
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| 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: | Institute of Geophysics, Swiss Federal Institute of Technology Zurich, Zurich, Switzerland
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| Recommended Citation: | |
Mignan A.. Modeling aftershocks as a stretched exponential relaxation[J]. Geophysical Research Letters,2015-01-01,42(22).
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