DOI: 10.1002/2014GL060035
论文题名: Controls on plate motion by oscillating tidal stress: Evidence from deep tremors in western Japan
作者: Ide S. ; Tanaka Y.
刊名: Geophysical Research Letters
ISSN: 0094-10601
EISSN: 1944-10332
出版年: 2014
卷: 41, 期: 11 起始页码: 3842
结束页码: 3850
语种: 英语
英文关键词: deep tremor
; large earthquakes
; plate motion
; seismicity
; tidal stress
Scopus关键词: Earth sciences
; Geophysics
; deep tremor
; Large earthquakes
; Plate motions
; seismicity
; Tidal stress
; Earthquakes
; correlation
; fault slip
; friction
; interface
; plate motion
; plate tectonics
; seismic survey
; shear flow
; Japan
英文摘要: Deep tremors are considered to be shear slip on the plate interface and are often sensitive to tidal stress. Here we demonstrate that a small cluster of tremors is extremely well correlated with tide levels observed at nearby stations in western Japan. The correlation is interpreted as representing a nonlinear relationship between stress and slip, which is similar to the rate-dependent friction law. An empirical relationship and observed tide records explain the temporal changes in tremor activity over 9 years. The combination of the nonlinear fault rheology and oscillating tidal stress may control temporal changes in plate motion and earthquake occurrence. Remarkably, the background seismicity is similar to the predicted tremor rate obtained from tidal observations over the past 50years. This mechanism may also explain the seasonality and decadal-scale weak periodicity of large earthquakes and is likely to be helpful in probabilistic forecasting of future seismicity. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84902030858&doi=10.1002%2f2014GL060035&partnerID=40&md5=5fdba7ed7824886a4b7d9e343bac83a9
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7865
Appears in Collections: 气候减缓与适应
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作者单位: Department of Earth and Planetary Science, University of Tokyo, Tokyo, Japan
Recommended Citation:
Ide S.,Tanaka Y.. Controls on plate motion by oscillating tidal stress: Evidence from deep tremors in western Japan[J]. Geophysical Research Letters,2014-01-01,41(11).