| DOI: | 10.1002/2015GL065207
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| 论文题名: | Slip-pulse rupture behavior on a 2 m granite fault |
| 作者: | McLaskey G.C.; Kilgore B.D.; Beeler N.M.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9584
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| EISSN: | 1944-9315
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| 出版年: | 2015
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| 卷: | 42, 期:17 | | 起始页码: | 7039
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| 结束页码: | 7045
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| 语种: | 英语
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| 英文关键词: | dynamic weakening
; laboratory earthquake
; self-healing slip pulse
; shear crack
; slip pulse
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| Scopus关键词: | Crack detection
; Cracks
; Dynamics
; Earthquakes
; Fault slips
; Friction
; Geophysics
; Granite
; Plates (structural components)
; Shear flow
; Shear waves
; Dynamic ruptures
; Frictional strength
; High frequency HF
; High-velocity frictions
; Large earthquakes
; Shear crack
; Shear wave speed
; Slip pulse
; Faulting
; crack
; fault slip
; granite
; instrumentation
; laboratory method
; S-wave
; wave propagation
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| 英文摘要: | We describe observations of dynamic rupture events that spontaneously arise on meter-scale laboratory earthquake experiments. While low-frequency slip of the granite sample occurs in a relatively uniform and crack-like manner, instruments capable of detecting high-frequency motions show that some parts of the fault slip abruptly (velocity > 100 mm s-1, acceleration > 20 km s-2) while the majority of the fault slips more slowly. Abruptly slipping regions propagate along the fault at nearly the shear wave speed. We propose that the dramatic reduction in frictional strength implied by this pulse-like rupture behavior has a common mechanism to the weakening reported in high-velocity friction experiments performed on rotary machines. The slip pulses can also be identified as migrating sources of high-frequency seismic waves. As observations from large earthquakes show similar propagating high-frequency sources, the pulses described here may have relevance to the mechanics of larger earthquakes. ©2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84943339166&doi=10.1002%2f2015GL065207&partnerID=40&md5=f22cf44c1e1c73a053417f64f9219be5
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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/9199
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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: | Cornell University, Ithaca, NY, United States
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| Recommended Citation: | |
McLaskey G.C.,Kilgore B.D.,Beeler N.M.. Slip-pulse rupture behavior on a 2 m granite fault[J]. Geophysical Research Letters,2015-01-01,42(17).
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