The 2018M(W)7.5 Papua New Guinea Earthquake A Dissipative and Cascading Rupture Process

doi:10.1029/2020GL089271

ISL OpenIR > 盐湖地质与环境实验室

	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
第一作者	Zhang, Xu
	2020-09-16
发表期刊	GEOPHYSICAL RESEARCH LETTERS
ISSN	0094-8276
卷号	47 期号:17
摘要	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
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/33988
专题	盐湖地质与环境实验室中国科学院青海盐湖研究所
推荐引用方式 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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