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DOI | 10.1002/2017GL075725 |
Prestate of Stress and Fault Behavior During the 2016 Kumamoto Earthquake (M7.3) | |
Matsumoto, Satoshi1; Yamashita, Yusuke2; Nakamoto, Manami3; Miyazaki, Masahiro2; Sakai, Shinichi4; Iio, Yoshihisa2; Shimizu, Hiroshi1; Goto, Kazuhiko5; Okada, Tomomi6; Ohzono, Mako7; Terakawa, Toshiko8; Kosuga, Masahiro9; Yoshimi, Masayuki10; Asano, Youichi11 | |
2018-01-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:2页码:637-645 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan |
英文摘要 | Fault behavior during an earthquake is controlled by the state of stress on the fault. Complex coseismic fault slip on large earthquake faults has recently been observed by dense seismic networks, which complicates strong motion evaluations for potential faults. Here we show the three-dimensional prestress field related to the 2016 Kumamoto earthquake. The estimated stress field reveals a spatially variable state of stress that forced the fault to slip in a direction predicted by the "Wallace and Bott Hypothesis." The stress field also exposes the pre-condition of pore fluid pressure on the fault. Large coseismic slip occurred in the low-pressure part of the fault. However, areas with highly pressured fluid also showed large displacement, indicating that the seismic moment of the earthquake was magnified by fluid pressure. These prerupture data could contribute to improved seismic hazard evaluations. Plain Language Summary The three-dimensional prestress field around the 2016 Kumamoto earthquake controlled fault behavior of the earthquake. The estimated heterogeneous state of stress on the fault forced the fault to slip in the direction predicted. The stress field also exposed the precondition of pore fluid pressure on the fault. Large coseismic slip occurred not only at the low-pressure part of the fault but also highly pressured part. It indicates that the seismic moment of the earthquake was magnified by fluid pressure. These prerupture data could contribute to upgrading seismic hazard evaluation. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000425514300018 |
WOS关键词 | 1979 IMPERIAL-VALLEY ; FOCAL MECHANISMS ; SEQUENCE ; RUPTURE ; JAPAN |
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/25958 |
专题 | 气候变化 |
作者单位 | 1.Kyushu Univ, Inst Seismol & Volcanol, Shimabara, Japan; 2.Kyoto Univ, Disaster Prevent Res Inst, Uji, Kyoto, Japan; 3.Natl Inst Polar Res, Tokyo, Japan; 4.Univ Tokyo, Earthquake Res Inst, Tokyo, Japan; 5.Kagoshima Univ, Grad Sch Sci & Engn, Kagoshima, Japan; 6.Tohoku Univ, Grad Sch Sci, Sendai, Miyagi, Japan; 7.Hokkaido Univ, Grad Sch Sci, Sapporo, Hokkaido, Japan; 8.Nagoya Univ, Grad Sch Environm Studies, Nagoya, Aichi, Japan; 9.Hirosaki Univ, Grad Sch Sci & Technol, Hirosaki, Aomori, Japan; 10.AIST, Geol Survey Japan, Tsukuba, Ibaraki, Japan; 11.Natl Res Inst Earth Sci & Disaster Resilience, Tsukuba, Ibaraki, Japan |
推荐引用方式 GB/T 7714 | Matsumoto, Satoshi,Yamashita, Yusuke,Nakamoto, Manami,et al. Prestate of Stress and Fault Behavior During the 2016 Kumamoto Earthquake (M7.3)[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(2):637-645. |
APA | Matsumoto, Satoshi.,Yamashita, Yusuke.,Nakamoto, Manami.,Miyazaki, Masahiro.,Sakai, Shinichi.,...&Asano, Youichi.(2018).Prestate of Stress and Fault Behavior During the 2016 Kumamoto Earthquake (M7.3).GEOPHYSICAL RESEARCH LETTERS,45(2),637-645. |
MLA | Matsumoto, Satoshi,et al."Prestate of Stress and Fault Behavior During the 2016 Kumamoto Earthquake (M7.3)".GEOPHYSICAL RESEARCH LETTERS 45.2(2018):637-645. |
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