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DOI | 10.1002/2017GL074469 |
Seismic Observations Indicating That the 2015 Ogasawara (Bonin) Earthquake Ruptured Beneath the 660 km Discontinuity | |
Kuge, Keiko | |
2017-11-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:21 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan |
英文摘要 | The termination of deep earthquakes at a depth of similar to 700 km is a key feature for understanding the physical mechanism of deep earthquakes. The similar to 680 km deep 30 May 2015, Ogasawara (Bonin) earthquake (M-w 7.9) and its aftershocks were recorded by seismic stations at distances from 7 degrees to 19 degrees. Synthetic seismograms indicate that the P waveforms depend on whether the earthquake is located above or below the 660 km discontinuity. In this study, I show that broadband recordings indicate that the 2015 earthquake may have occurred below the 660 km velocity discontinuity. Recordings of the P wave from the strongest aftershock lack evidence for wave triplication expected when a subhorizontal discontinuity underlies the hypocenter. Theoretical waveforms computed with a 660 km discontinuity above the aftershock and mainshock match the observed waveforms more accurately. These observations may indicate earthquake ruptures due to mantle minerals other than olivine or strong deformation of the 660 km phase transition. |
英文关键词 | deep earthquakes the 660 km discontinuity |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000418572900017 |
WOS关键词 | DEEP-FOCUS EARTHQUAKES ; MANTLE TRANSITION ZONE ; IZU-BONIN ; SUBDUCTING LITHOSPHERE ; ISOTROPIC COMPONENT ; 1994 BOLIVIA ; WAVE-FORMS ; SLAB ; TOPOGRAPHY ; LOCATION |
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/28068 |
专题 | 气候变化 |
作者单位 | Kyoto Univ, Dept Geophys, Kyoto, Japan |
推荐引用方式 GB/T 7714 | Kuge, Keiko. Seismic Observations Indicating That the 2015 Ogasawara (Bonin) Earthquake Ruptured Beneath the 660 km Discontinuity[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(21). |
APA | Kuge, Keiko.(2017).Seismic Observations Indicating That the 2015 Ogasawara (Bonin) Earthquake Ruptured Beneath the 660 km Discontinuity.GEOPHYSICAL RESEARCH LETTERS,44(21). |
MLA | Kuge, Keiko."Seismic Observations Indicating That the 2015 Ogasawara (Bonin) Earthquake Ruptured Beneath the 660 km Discontinuity".GEOPHYSICAL RESEARCH LETTERS 44.21(2017). |
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