Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL092183 |
Seismological Structures on Bimodal Distribution of Deep Tectonic Tremor | |
Yasunori Sawaki; Yoshihiro Ito; Kazuaki Ohta; Takuo Shibutani; Tomotaka Iwata | |
2021-04-11 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | Deep tectonic tremors occur at the downdip extent of the seismogenic zone due to fluid processes. Beneath the northeastern Kii Peninsula, southwestern Japan, there is an along‐dip bimodal distribution of tremor. However, no constraint exists on the structures controlling that distribution. We extract detailed seismological structures from multi‐band receiver functions and evaluate conditional differences in the distribution. To achieve high resolution images along the plate interface, we utilize records of regional deep‐focus earthquakes from the Pacific slab. Cross‐section images show the subducting oceanic plate with depth‐dependent phases along the bimodal distribution, revealing a conspicuous plate interface at the updip portion and an inconspicuous interface below the mantle wedge at the downdip portion. This indicates that episodic tremors occur in the high pore‐fluid plate interface below the impermeable forearc crust, and that continual tremors occur at the permeable mantle wedge corner, owing to continuous fluid supply from the oceanic crust. |
领域 | 气候变化 |
URL | 查看原文 |
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/322025 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Yasunori Sawaki,Yoshihiro Ito,Kazuaki Ohta,et al. Seismological Structures on Bimodal Distribution of Deep Tectonic Tremor[J]. Geophysical Research Letters,2021. |
APA | Yasunori Sawaki,Yoshihiro Ito,Kazuaki Ohta,Takuo Shibutani,&Tomotaka Iwata.(2021).Seismological Structures on Bimodal Distribution of Deep Tectonic Tremor.Geophysical Research Letters. |
MLA | Yasunori Sawaki,et al."Seismological Structures on Bimodal Distribution of Deep Tectonic Tremor".Geophysical Research Letters (2021). |
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