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

doi:10.1029/2020GL089271

CORC > 青海盐湖研究所 > 中国科学院青海盐湖研究所 > 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
刊名	GEOPHYSICAL RESEARCH LETTERS
	2020-09-16
卷号	47 期号:17
ISSN号	0094-8276
DOI	10.1029/2020GL089271
英文摘要	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.
内容类型	期刊论文
源URL	[http://ir.isl.ac.cn/handle/363002/33988]
专题	青海盐湖研究所_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).