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DOI | 10.1002/2017GL073789 |
Subduction of thick oceanic plateau and high-angle normal-fault earthquakes intersecting the slab | |
Arai, Ryuta1; Kodaira, Shuichi1; Yamada, Tomoaki2; Takahashi, Tsutomu1; Miura, Seiichi1; Kaneda, Yoshiyuki3; Nishizawa, Azusa4; Oikawa, Mitsuhiro4 | |
2017-06-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan |
英文摘要 | The role of seamounts on interplate earthquakes has been debated. However, its impact on intraslab deformation is poorly understood. Here we present unexpected evidence for large normal-fault earthquakes intersecting the slab just ahead of a subducting seamount. In 1995, a series of earthquakes with maximum magnitude of 7.1 occurred in northern Ryukyu where oceanic plateaus are subducting. The aftershock distribution shows that conjugate faults with an unusually high dip angle of 70-80 degrees ruptured the entire subducting crust. Seismic reflection images reveal that the plate interface is displaced over 1km along one of the fault planes of the 1995 events. These results suggest that a lateral variation in slab buoyancy can produce sufficient differential stress leading to near-vertical normal-fault earthquakes within the slab. On the contrary, the upper surface of the seamount (plate interface) may correspond to a weakly coupled region, reflecting the dual effects of seamounts/plateaus on subduction earthquakes. |
英文关键词 | intraslab earthquakes displaced plate interface seamount subduction seismic reflection seismic tomography |
领域 | 气候变化 |
收录类别 | SCI-E ; SSCI |
WOS记录号 | WOS:000405854200028 |
WOS关键词 | PHILIPPINE SEA PLATE ; SEAMOUNT ; ZONE ; RUPTURE ; TRENCH ; MODEL |
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/27202 |
专题 | 气候变化 |
作者单位 | 1.Japan Agcy Marine Earth Sci & Technol, Res & Dev Ctr Earthquake & Tsunami, Yokohama, Kanagawa, Japan; 2.Univ Tokyo, Earthquake Res Inst, Tokyo, Japan; 3.Kagawa Univ, Inst Educ Res & Reg Cooperat Crisis Management Sh, Takamatsu, Kagawa, Japan; 4.Japan Coast Guard, Hydrog & Oceanog Dept, Tokyo, Japan |
推荐引用方式 GB/T 7714 | Arai, Ryuta,Kodaira, Shuichi,Yamada, Tomoaki,et al. Subduction of thick oceanic plateau and high-angle normal-fault earthquakes intersecting the slab[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(12). |
APA | Arai, Ryuta.,Kodaira, Shuichi.,Yamada, Tomoaki.,Takahashi, Tsutomu.,Miura, Seiichi.,...&Oikawa, Mitsuhiro.(2017).Subduction of thick oceanic plateau and high-angle normal-fault earthquakes intersecting the slab.GEOPHYSICAL RESEARCH LETTERS,44(12). |
MLA | Arai, Ryuta,et al."Subduction of thick oceanic plateau and high-angle normal-fault earthquakes intersecting the slab".GEOPHYSICAL RESEARCH LETTERS 44.12(2017). |
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