| DOI: | 10.1002/2015GL067490
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| 论文题名: | Scaling in natural and laboratory earthquakes |
| 作者: | Nielsen S.; Spagnuolo E.; Smith S.A.F.; Violay M.; Di Toro G.; Bistacchi A.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9336
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| EISSN: | 1944-9067
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| 出版年: | 2016
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| 卷: | 43, 期:4 | | 起始页码: | 1504
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| 结束页码: | 1510
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| 语种: | 英语
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| 英文关键词: | earthquake scaling
; fracture energy
; high-velocity friction experiments
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| Scopus关键词: | Earthquakes
; Fracture
; Fracture energy
; Friction
; Geophysics
; Shear stress
; Fault zone structures
; High-velocity frictions
; Laboratory experiments
; Lubrication process
; Power-law
; Seismic observation
; Seismic slips
; Seismology
; complexity
; fault zone
; fracture
; friction
; laboratory method
; lubricant
; power law
; seismology
; shear stress
|
| 英文摘要: | Laboratory experiments reproducing seismic slip conditions show extreme frictional weakening due to the activation of lubrication processes. Due to a substantial variability in the details of the weakening transient, generalization of experimental results and comparison to seismic observations have not been possible so far. Here we show that during the weakening, shear stress τ is generally well matched by a power law of slip u in the form τu-α (with 0.35 < α < 0.6). The resulting fracture energy Gf can be approximated by a power law in some aspects in agreement with the seismological estimates G′. It appears that Gf and G′ are comparable in the range 0.01 < u < 0.3 m. However, G′ surpasses Gf at larger slips: at u≈10 m, G′≈108 and Gf≈106. Possible interpretations of this misfit involve the complexity of damage and weakening mechanisms within mature fault zone structures. ©2016. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84975743205&doi=10.1002%2f2015GL067490&partnerID=40&md5=283c46eafc3c7182eee1851aef1c1383
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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/10299
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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: | Istituto Nazionale di Geofisica e Vucanologia, Rome, Italy
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| Recommended Citation: | |
Nielsen S.,Spagnuolo E.,Smith S.A.F.,et al. Scaling in natural and laboratory earthquakes[J]. Geophysical Research Letters,2016-01-01,43(4).
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