气候变化领域集成服务门户(CCPortal): Stress Sensitivity of Instantaneous Dynamic Triggering of Shallow Slow Slip Events

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DOI	10.1029/2019JB019178
	Stress Sensitivity of Instantaneous Dynamic Triggering of Shallow Slow Slip Events
	Katakami S.; Kaneko Y.; Ito Y.; Araki E.
发表日期	2020
ISSN	21699313
卷号	125 期号:6
英文摘要	Dynamic triggering of large, detectable slow slip events (SSEs) is rarely observed, even though regional earthquakes often trigger tectonic tremors and very low frequency earthquakes. In this study, we investigate stress sensitivity of dynamic triggering of shallow SSEs in the Nankai Trough offshore of Kii Peninsula, Japan. We first identify additional shallow SSEs that have not been reported in previous studies and obtain a 15-year-long catalog of SSEs, some of which are triggered by passing seismic waves originating from large regional earthquakes. We then quantify dynamic and static stress perturbations on the plate interface induced by 19 candidate regional earthquakes using numerical simulations of seismic wave propagation. We find that SSE propensity to dynamic triggering depends mainly on the maximum Coulomb stress change and that relatively large dynamic stresses (>10–20 kPa) are needed to trigger a shallow SSE in the Nankai Trough. Regional earthquakes that can induce such large amplitude of dynamic stresses on the plate interface are relatively rare, which might explain the scarcity of dynamic triggering of large, detectable SSEs along the Nankai as well as other subduction zones. In addition, our analysis suggests that intraslab earthquakes can efficiently trigger SSEs in subduction zones via less-attenuated, slab-guided waves. Moreover, our results support the idea that an accretionary wedge in subduction zones promotes the dynamic triggering of shallow SSEs. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	coulomb stress changes; dynamic triggering; slow slip events; tectonic tremors
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187815
作者单位	Division of Earth and Planetary Sciences, Kyoto University, Kyoto, Japan; Disaster Prevention Research institute, Kyoto University, Kyoto, Japan; GNS Science, Lower Hutt, New Zealand; Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan
推荐引用方式 GB/T 7714	Katakami S.,Kaneko Y.,Ito Y.,et al. Stress Sensitivity of Instantaneous Dynamic Triggering of Shallow Slow Slip Events[J],2020,125(6).
APA	Katakami S.,Kaneko Y.,Ito Y.,&Araki E..(2020).Stress Sensitivity of Instantaneous Dynamic Triggering of Shallow Slow Slip Events.Journal of Geophysical Research: Solid Earth,125(6).
MLA	Katakami S.,et al."Stress Sensitivity of Instantaneous Dynamic Triggering of Shallow Slow Slip Events".Journal of Geophysical Research: Solid Earth 125.6(2020).