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DOI | 10.1002/2017GL074934 |
Do weak global stresses synchronize earthquakes? | |
Bendick, R.1; Bilham, R.2 | |
2017-08-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:16 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Insofar as slip in an earthquake is related to the strain accumulated near a fault since a previous earthquake, and this process repeats many times, the earthquake cycle approximates an autonomous oscillator. Its asymmetric slow accumulation of strain and rapid release is quite unlike the harmonic motion of a pendulum and need not be time predictable, but still resembles a class of repeating systems known as integrate-and-fire oscillators, whose behavior has been shown to demonstrate a remarkable ability to synchronize to either external or self-organized forcing. Given sufficient time and even very weak physical coupling, the phases of sets of such oscillators, with similar though not necessarily identical period, approach each other. Topological and time series analyses presented here demonstrate that earthquakes worldwide show evidence of such synchronization. Though numerous studies demonstrate that the composite temporal distribution of major earthquakes in the instrumental record is indistinguishable from random, the additional consideration of event renewal interval serves to identify earthquake groupings suggestive of synchronization that are absent in synthetic catalogs. We envisage the weak forces responsible for clustering originate from lithospheric strain induced by seismicity itself, by finite strains over teleseismic distances, or by other sources of lithospheric loading such as Earth's variable rotation. For example, quasi-periodic maxima in rotational deceleration are accompanied by increased global seismicity at multidecadal intervals. Plain Language Summary Large earthquakes appear to synchronize globally, in the sense that they are organized in time according to their renewal properties, and occur in groups in response to very low stress interactions. |
英文关键词 | global earthquakes synchronization clustering Earth rotation |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000410658800028 |
WOS关键词 | OSCILLATORS ; MOMENT ; MODEL |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/29145 |
专题 | 气候变化 |
作者单位 | 1.Univ Montana, Missoula, MT 59812 USA; 2.Univ Colorado, CIRES, Boulder, CO 80309 USA |
推荐引用方式 GB/T 7714 | Bendick, R.,Bilham, R.. Do weak global stresses synchronize earthquakes?[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(16). |
APA | Bendick, R.,&Bilham, R..(2017).Do weak global stresses synchronize earthquakes?.GEOPHYSICAL RESEARCH LETTERS,44(16). |
MLA | Bendick, R.,et al."Do weak global stresses synchronize earthquakes?".GEOPHYSICAL RESEARCH LETTERS 44.16(2017). |
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