| The 2018M(W)7.5 Papua New Guinea Earthquake A Dissipative and Cascading Rupture Process | |
Zhang, Xu; Feng, Wanpeng; Du, Hailin; Li, Lu; Wang, Shuai; Yi, Lei ; Wang, Yongzhe
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| FirstAuthor | Zhang, Xu |
| 2020-09-16 | |
| Source Publication | GEOPHYSICAL RESEARCH LETTERS
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| ISSN | 0094-8276 |
| Volume | 47Issue:17 |
| Abstract | The 2018M(W)7.5 Papua New Guinea earthquake is the largest earthquake instrumentally recorded in the Papuan Fold Belt since 1900. Based on a combined analysis of backprojection imaging and finite-fault joint inversion, we determined a complex spatiotemporal rupture model of the mainshock. During the rupture process, three major asperities were ruptured successively with relatively low rupture velocities ranging from 1.9 to 2.3 km/s. The spatiotemporal evolution of the imparted Coulomb stress indicates that the rupture of the preceding asperity played an important role in triggering the delayed rupture of the adjacent asperity. Based on our rupture model, the upper bound of the radiation efficiency of this event is estimated to be 9.7-12.3%, a relatively low value, indicating that this earthquake is extremely dissipative. The high energy dissipation implies that the 2018M(W)7.5 Papua New Guinea earthquake may be controlled by the immature seismogenic environment. |
| DOI | 10.1029/2020GL089271 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.isl.ac.cn/handle/363002/33988 |
| Collection | 盐湖地质与环境实验室 中国科学院青海盐湖研究所 |
| Recommended Citation GB/T 7714 | Zhang, Xu,Feng, Wanpeng,Du, Hailin,et al. The 2018M(W)7.5 Papua New Guinea Earthquake A Dissipative and Cascading Rupture Process[J]. GEOPHYSICAL RESEARCH LETTERS,2020,47(17). |
| APA | Zhang, Xu.,Feng, Wanpeng.,Du, Hailin.,Li, Lu.,Wang, Shuai.,...&Wang, Yongzhe.(2020).The 2018M(W)7.5 Papua New Guinea Earthquake A Dissipative and Cascading Rupture Process.GEOPHYSICAL RESEARCH LETTERS,47(17). |
| MLA | Zhang, Xu,et al."The 2018M(W)7.5 Papua New Guinea Earthquake A Dissipative and Cascading Rupture Process".GEOPHYSICAL RESEARCH LETTERS 47.17(2020). |
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| The 2018M(W)7.5 Papu（2096KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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