DOI: 10.1002/2016GL070145
论文题名: Sensitivity of stress inversion of focal mechanisms to pore pressure changes
作者: Martínez-Garzón P. ; Vavryčuk V. ; Kwiatek G. ; Bohnhoff M.
刊名: Geophysical Research Letters
ISSN: 0094-8763
EISSN: 1944-8494
出版年: 2016
卷: 43, 期: 16 起始页码: 8441
结束页码: 8450
语种: 英语
英文关键词: faulting regime
; fluid-induced seismicity
; focal mechanisms
; pore pressure
; stress inversion
; synthetic stress
Scopus关键词: Faulting
; Geothermal fields
; Pore pressure
; Seismology
; Focal mechanism
; Geysers geothermal fields
; Intermediate principal stress
; Maximum and minimum principal stress
; Pressure variations
; Selection criteria
; Stress inversion
; Synthetic tests
; Induced Seismicity
英文摘要: We investigate the sensitivity of stress inversion from focal mechanisms to pore pressure changes. Synthetic tests reveal that pore pressure variations can cause apparent changes in the retrieved stress ratio R relating the magnitude of the intermediate principal stress with respect to the maximum and minimum principal stresses. Pore pressure and retrieved R are negatively correlated when R is low (R < 0.6). The spurious variations in retrieved R are suppressed when R > 0.6. This observation is independent of faulting style, and it may be related to different performance of the fault plane selection criterion and variability in orientation of activated faults under different pore pressures. Our findings from synthetic data are supported by results obtained from induced seismicity at The Geysers geothermal field. Therefore, the retrieved stress ratio variations can be utilized for monitoring pore pressure changes at seismogenic depth in stress domains with overall low R. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84983440063&doi=10.1002%2f2016GL070145&partnerID=40&md5=0f3391537017fb17ae2f3eced7173318
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9726
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: Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany
Recommended Citation:
Martínez-Garzón P.,Vavryčuk V.,Kwiatek G.,et al. Sensitivity of stress inversion of focal mechanisms to pore pressure changes[J]. Geophysical Research Letters,2016-01-01,43(16).