气候变化领域集成服务门户(CCPortal): The 2018 Fiji Mw 8.2 and 7.9 deep earthquakes: One doublet in two slabs

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DOI	10.1016/j.epsl.2019.115997
	The 2018 Fiji Mw 8.2 and 7.9 deep earthquakes: One doublet in two slabs
	Jia Z.; Shen Z.; Zhan Z.; Li C.; Peng Z.; Gurnis M.
发表日期	2020
ISSN	0012821X
卷号	531
英文摘要	The cold Fiji-Tonga subduction zone accounts for >75% of cataloged deep earthquakes but none of the largest ten in the last century. On 19 August 2018 and 06 September 2018, a deep earthquake doublet with moment magnitude (Mw) 8.2 and 7.9 struck the Fiji area, providing a rare opportunity to interrogate the behaviors of great deep earthquakes in cold slabs. While the aftershock productivity of the 2018 Mw 8.2 event is similar to the 2013 Okhotsk Mw 8.3 event in a cold slab, the inferred compact rupture dimensions of both the Mw 8.2 and 7.9 events appear to be similar to the 1994 Bolivia earthquake in a warm slab. This seems to contradict the traditional view that slab temperature controls deep earthquakes. However, we find that neither event was confined within the cold Tonga slab core: the Mw 8.2 ruptured mostly in the warmer rim of the Tonga slab and the Mw 7.9 occurred in a warm relic slab leaning on top of the Tonga slab. The Fiji doublet demonstrates local slab temperature as the critical factor for deep earthquakes, and reveals complex interaction of subducted slabs in Tonga. © 2019 Elsevier B.V.
关键词	deep earthquakes earthquake doublet rupture process slab temperature Tonga slab
英文关键词	Geology; Mathematical models; 8.2 events; Critical factors; Deep earthquakes; Moment magnitudes; Rupture process; Slab temperature; Subduction zones; Tonga slab; Earthquakes; aftershock; earthquake event; earthquake magnitude; earthquake rupture; slab; subduction zone; surface temperature; Bolivia; Tonga
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202678
作者单位	Seismological Laboratory, California Institute of Technology, Pasadena, CA 91125, United States; School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA 30332, United States
推荐引用方式 GB/T 7714	Jia Z.,Shen Z.,Zhan Z.,et al. The 2018 Fiji Mw 8.2 and 7.9 deep earthquakes: One doublet in two slabs[J],2020,531.
APA	Jia Z.,Shen Z.,Zhan Z.,Li C.,Peng Z.,&Gurnis M..(2020).The 2018 Fiji Mw 8.2 and 7.9 deep earthquakes: One doublet in two slabs.Earth and Planetary Science Letters,531.
MLA	Jia Z.,et al."The 2018 Fiji Mw 8.2 and 7.9 deep earthquakes: One doublet in two slabs".Earth and Planetary Science Letters 531(2020).