期刊
GEOPHYSICAL RESEARCH LETTERS
卷 43, 期 10, 页码 4905-4912出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2016GL068168
关键词
-
资金
- NSF-EAR Postdoctoral Fellowship [1249776]
- Kobe University Research Center for Urban Safety and Security
- Directorate For Geosciences
- Division Of Earth Sciences [1249776] Funding Source: National Science Foundation
- Grants-in-Aid for Scientific Research [16H06477, 16H04040] Funding Source: KAKEN
The 30 May 2015 Chichi-jima M8 earthquake is one of the largest deep focus earthquakes ever recorded and its depth of 682km puts it near the base of the mantle transition zone. Before source mechanisms and slip models of this earthquake can be reliably assessed, a better understanding of the tectonic setting and structures of the region near the origin is required. Here we present evidence from receiver functions, a method of isolating subsurface material contrast with converted seismic waves, that the earthquake initiated within the upper mantle transition zone, above a significantly depressed 660km phase boundary. Additionally, we observe multiple conversions within and below the transition zone, which we associate with seismic waves passing into and out of segments of the subducting Pacific plate. From this, we infer slab material is piling up at the base of the transition zone and segments are penetrating into the lower mantle.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据