Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL072803 |
Strain release at the trench during shallow slow slip: The example of Nicoya Peninsula, Costa Rica | |
Jiang, Yan1; Liu, Zhen2; Davis, Earl E.1; Schwartz, Susan Y.3; Dixon, Timothy H.4; Voss, Nick4; Malservisi, Rocco4; Protti, Marino5 | |
2017-05-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:10 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada; USA; Costa Rica |
英文摘要 | The near-trench behavior of subduction megathrust faults is critical for understanding earthquake hazard and tsunami generation. The shallow subduction interface is typically located in unconsolidated sediments that are considered too weak to accumulate elastic strain. However, the spectrum of shallow fault slip behavior is still elusive, due in large part to the lack of near-field observations. Here we combine measurements from seafloor pressure sensors near the trench and an onshore GPS network in a time-dependent inversion to image the initiation and migration of a well-documented slow slip event (SSE) in 2007 at the Nicoya Peninsula, Costa Rica. Our results show that the shallow SSE initiated on the shallow subduction interface at a depth of similar to 15km, where pore fluid pressure is inferred to be high, and propagated all the way to the trench. The migrating event may have triggered a second subevent that occurred 1 month later. Our results document the release of elastic strain at the shallow part of the subduction megathrust and suggest prior accumulation of elastic strain. In conjunction with near-trench shallow slow slip recently reported for the Hikurangi subduction zone and trench breaching ruptures revealed in some large earthquakes, our results suggest that near-trench strain accumulation and release at the shallower portions of the subduction interface is more common than previously thought. |
英文关键词 | slow slip event seafloor geodesy subduction zone |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000404131900057 |
WOS关键词 | CORK BOREHOLE PRESSURE ; SUBDUCTION ZONE ; EARTHQUAKE RUPTURE ; SILENT SLIP ; NANKAI TROUGH ; DEFORMATION ; TREMOR ; PRISM ; GPS ; SEISMICITY |
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/28796 |
专题 | 气候变化 |
作者单位 | 1.Nat Resources Canada, Geol Survey Canada, Sidney, BC, Canada; 2.CALTECH, Jet Prop Lab, Pasadena, CA USA; 3.Univ Calif Santa Cruz, Dept Earth & Planetary Sci, Santa Cruz, CA 95064 USA; 4.Univ S Florida, Dept Geol, Tampa, FL 33620 USA; 5.Univ Nacl, Observ Vulcanolo & Sismol Costa Rica, Heredia, Costa Rica |
推荐引用方式 GB/T 7714 | Jiang, Yan,Liu, Zhen,Davis, Earl E.,et al. Strain release at the trench during shallow slow slip: The example of Nicoya Peninsula, Costa Rica[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(10). |
APA | Jiang, Yan.,Liu, Zhen.,Davis, Earl E..,Schwartz, Susan Y..,Dixon, Timothy H..,...&Protti, Marino.(2017).Strain release at the trench during shallow slow slip: The example of Nicoya Peninsula, Costa Rica.GEOPHYSICAL RESEARCH LETTERS,44(10). |
MLA | Jiang, Yan,et al."Strain release at the trench during shallow slow slip: The example of Nicoya Peninsula, Costa Rica".GEOPHYSICAL RESEARCH LETTERS 44.10(2017). |
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