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DOI | 10.1029/2019GL082121 |
Earthquake-Related Structures Beneath the Southernmost Portion of the Ryukyu Arc and Forearc | |
Wang, Shiou-Ya1; Hsu, Shu-Kun1,2; Yeh, Yi-Ching1 | |
2019-04-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:7页码:3717-3725 |
文章类型 | Article |
语种 | 英语 |
国家 | Taiwan |
英文摘要 | Moderate to large earthquakes repeatedly occur beneath the southernmost Ryukyu arc and forearc, but the seismogenic structures were poorly studied. To better understand the southernmost Ryukyu seismogenic structures, we have deployed ocean bottom seismometers to record the aftershocks of a large earthquake in 2015. As a result, several groups of aftershocks are associated with the seismogenic structures. A deep group coincides with the north-dipping seismogenic zone that terminates near the tip of the mantle wedge beneath the Ryukyu Arc. A shallow group dips southward from the southern slope of the Ryukyu Arc to the southern end of the aftershocks; this group shows south-dipping normal faulting character and accompanies the lower crust exhumation of Ryukyu Arc above the seismogenic zone. A plate interface step-down beneath the seismogenic zone is inferred. A crustal underplating and exhumation around the seismogenic zone have taken place synchronously during the earthquake event. Plain Language Summary Large earthquakes frequently occur at the plate boundary where two plates converge. Those earthquakes usually appear at a segment of the downgoing plate surface, called a seismogenic zone. Seismogenic zones are extensively studied in order to understand the possible earthquake cycles, crustal stress variation, mechanisms of earthquake nucleation, rupture propagation, and so on. Historically, the southernmost Ryukyu seismogenic zone has generated numerous earthquakes but its seismogenic structures are still unclear. By studying aftershocks of a large earthquake in 2015, we show the general characters of the southernmost Ryukyu seismogenic zone and indicate a synchronous occurrence of the uplift of the south Ryukyu Arc and accumulation of some subducted material beneath the Ryukyu Arc. |
英文关键词 | seismogenic zone underplating exhumation Ryukyu subduction zone earthquake |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000465836200016 |
WOS关键词 | PHILIPPINE SEA PLATE ; ACCRETIONARY WEDGE ; SUBDUCTION ZONE ; OKINAWA TROUGH ; OBLIQUE SUBDUCTION ; SEISMOGENIC ZONE ; VELOCITY-FIELD ; OCEANIC-CRUST ; UPDIP LIMIT ; TAIWAN |
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/182364 |
专题 | 气候变化 |
作者单位 | 1.Natl Cent Univ, Dept Earth Sci, Taoyuan, Taiwan; 2.Natl Cent Univ, Ctr Environm Studies, Taoyuan, Taiwan |
推荐引用方式 GB/T 7714 | Wang, Shiou-Ya,Hsu, Shu-Kun,Yeh, Yi-Ching. Earthquake-Related Structures Beneath the Southernmost Portion of the Ryukyu Arc and Forearc[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(7):3717-3725. |
APA | Wang, Shiou-Ya,Hsu, Shu-Kun,&Yeh, Yi-Ching.(2019).Earthquake-Related Structures Beneath the Southernmost Portion of the Ryukyu Arc and Forearc.GEOPHYSICAL RESEARCH LETTERS,46(7),3717-3725. |
MLA | Wang, Shiou-Ya,et al."Earthquake-Related Structures Beneath the Southernmost Portion of the Ryukyu Arc and Forearc".GEOPHYSICAL RESEARCH LETTERS 46.7(2019):3717-3725. |
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