Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL089201 |
Seismic attenuation monitoring of a critically stressed San Andreas fault | |
Luca Malagnini; Tom Parsons | |
2020-11-20 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2020 |
英文摘要 | We show that seismic attenuation ( ) along the San Andreas fault (SAF) at Parkfield correlates with the occurrence of moderate‐to‐large earthquakes at local and regional distances. Earthquake‐related anomalies are likely caused by changes in permeability from dilatant static stress changes, damage by strong shaking from local sources, and pore unclogging/clogging from mobilization of colloids by dynamic strains. We find that, prior to the 2004 M6 Parkfield earthquake, pre‐failure conditions for some local events of moderate magnitude correspond to positive anomalies of on the Pacific side, with local and regional earthquakes producing sharp attenuation reversals. After the 2004 Parkfield earthquake we see higher anomalies along the SAF, but low sensitivity to local and regional earthquakes, probably because the mainshock significantly altered the permeability state of the rocks adjacent to the SAF, and its sensitivity to earthquake‐induced stress perturbations. |
领域 | 气候变化 |
URL | 查看原文 |
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文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/304256 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Luca Malagnini,Tom Parsons. Seismic attenuation monitoring of a critically stressed San Andreas fault[J]. Geophysical Research Letters,2020. |
APA | Luca Malagnini,&Tom Parsons.(2020).Seismic attenuation monitoring of a critically stressed San Andreas fault.Geophysical Research Letters. |
MLA | Luca Malagnini,et al."Seismic attenuation monitoring of a critically stressed San Andreas fault".Geophysical Research Letters (2020). |
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