| DOI: | 10.1002/2014GL062863
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| 论文题名: | On the stress dependence of the earthquake b value |
| 作者: | Scholz C.H.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8906
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| EISSN: | 1944-8637
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| 出版年: | 2015
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| 卷: | 42, 期:5 | | 起始页码: | 1399
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| 结束页码: | 1402
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| 语种: | 英语
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| 英文关键词: | b value
; earthquakes
; stress
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| Scopus关键词: | Earthquakes
; Lithology
; Stresses
; B value
; Continental lithosphere
; Differential stress
; Frictional strength
; Laboratory experiments
; Stress dependence
; Stress difference
; Subduction zones
; Acoustic emission testing
; continental lithosphere
; earthquake intensity
; size distribution
; slab
; strength
; subduction zone
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| 英文摘要: | Laboratory experiments have shown that the b value in the size distribution of acoustic emission events decreases linearly with differential stress. There have been a number of observations that indicate that this relation may also hold for earthquakes. Here using a simple frictional strength model for stresses in the continental lithosphere combined with earthquake b values measured as a function of depth in a wide variety of tectonic regions, we verify and calibrate that relation, finding b = 1.23 ± 0.06-(0.0012 ± 0.0003)(σ1-σ3), where the stress difference (σ1-σ3) is in megapascal. For subduction zones, we find that b value correlates linearly with the slab pull force and with the net reduction of plate interface normal force, both of which also indicate a negative linear relation between b value and differential stress. © 2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84925874577&doi=10.1002%2f2014GL062863&partnerID=40&md5=54218700689ac4a9b737bae8296e2e61
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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/8522
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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: | Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States
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| Recommended Citation: | |
Scholz C.H.. On the stress dependence of the earthquake b value[J]. Geophysical Research Letters,2015-01-01,42(5).
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