Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019GL084480 |
Across-Fault Velocity Gradients and Slip Behavior of the San Andreas Fault Near Parkfield | |
Agostinetti, N. Piana1; Giacomuzzi, G.2; Chiarabba, C.2 | |
2020-01-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
![]() |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2020 |
卷号 | 47期号:1 |
文章类型 | Article |
语种 | 英语 |
国家 | Austria; Italy |
英文摘要 | A long-lasting question in earthquake physics is why slip on faults occurs as creep or dynamic rupture. We compute passive measurements of the seismic P wave velocity gradient across the San Andreas Fault near Parkfield, where this transition of slip mode occurs at a scale of a few kilometers. Unbiased measurements are obtained through the application of a new Bayesian local earthquake tomographic code that avoids the imposition of any user-defined, initial velocity-contrast across the fault, or any damping scheme that may cause biased amplitude in retrieved seismic velocities. We observe that across-fault velocity gradients correlate with the slip behavior of the fault. The P wave velocity contrast decays from 20% in the fault section that experience dynamic rupture to 4% in the creeping section, suggesting that rapid change of material properties and attitude to sustain supra-hydrostatic fluid pressure are conditions for development of dynamic rupture. Low Vp and high Vp/Vs suggest that fault rheology at shallow depth is conversely controlled by low frictional strength material. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000513983400020 |
WOS关键词 | SLOW EARTHQUAKES ; CREEPING SECTION ; SAFOD SITE ; CALIFORNIA ; STRENGTH ; FRICTION ; ZONE ; PREDICTION ; LOCATIONS ; INVERSION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/279509 |
专题 | 气候变化 |
作者单位 | 1.Univ Wien, Dept Geodynam & Sedimentol, Vienna, Austria; 2.Ist Nazl Geofis & Vulcanol, Rome, Italy |
推荐引用方式 GB/T 7714 | Agostinetti, N. Piana,Giacomuzzi, G.,Chiarabba, C.. Across-Fault Velocity Gradients and Slip Behavior of the San Andreas Fault Near Parkfield[J]. GEOPHYSICAL RESEARCH LETTERS,2020,47(1). |
APA | Agostinetti, N. Piana,Giacomuzzi, G.,&Chiarabba, C..(2020).Across-Fault Velocity Gradients and Slip Behavior of the San Andreas Fault Near Parkfield.GEOPHYSICAL RESEARCH LETTERS,47(1). |
MLA | Agostinetti, N. Piana,et al."Across-Fault Velocity Gradients and Slip Behavior of the San Andreas Fault Near Parkfield".GEOPHYSICAL RESEARCH LETTERS 47.1(2020). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论