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DOI | 10.1029/2021GL093111 |
Lower Mantle Seismicity following the 2015 Mw 7.9 Bonin Islands Deep-Focus Earthquake | |
Eric Kiser; Haiyang Kehoe; Min Chen; Amanda Hughes | |
2021-06-26 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | Deep-focus earthquakes provide insight into how subducting slabs deform over a range of spatial and temporal scales as they descend into the mantle. This study uses a 4D source imaging approach to determine centroid locations of the 2015 Mw 7.9 Bonin Islands deep-focus earthquake and its aftershock sequence. Imaged sources of the mainshock show a complex rupture, but one that is compatible with a sub-horizontal rupture plane. Previously undetected early aftershocks are imaged down to depths of approximately 750 km and represent the first reported earthquakes that initiate in the lower mantle. These events and a previously reported group of shallower distal aftershocks occur at the lower and upper boundaries of an imaged slab segment that deforms as it penetrates into the lower mantle. We hypothesize that mainshock failure allowed gravitational settling of the slab segment to occur which produced the distal aftershock sequences. This article is protected by copyright. All rights reserved. |
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/333713 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Eric Kiser,Haiyang Kehoe,Min Chen,et al. Lower Mantle Seismicity following the 2015 Mw 7.9 Bonin Islands Deep-Focus Earthquake[J]. Geophysical Research Letters,2021. |
APA | Eric Kiser,Haiyang Kehoe,Min Chen,&Amanda Hughes.(2021).Lower Mantle Seismicity following the 2015 Mw 7.9 Bonin Islands Deep-Focus Earthquake.Geophysical Research Letters. |
MLA | Eric Kiser,et al."Lower Mantle Seismicity following the 2015 Mw 7.9 Bonin Islands Deep-Focus Earthquake".Geophysical Research Letters (2021). |
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