气候变化领域集成服务门户(CCPortal): Seismic Evidence for a Shallow Detachment Beneath Kīlauea's South Flank During the 2018 Activity

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DOI	10.1029/2020GL088003
	Seismic Evidence for a Shallow Detachment Beneath Kīlauea's South Flank During the 2018 Activity
	Lin G.; Okubo P.G.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:15
英文摘要	We investigate earthquake distribution and focal mechanisms associated with the 2018 Kīlauea volcano eruption in Hawaii. Our high-precision earthquake relocations delineate an aseismic zone bounded by two subhorizontal bands of seismicity at 3.5 and 7 km depths beneath the eastern south flank, both of which are dominated by the shallow-dipping reverse faulting during the 2018 activity. We interpret the deeper seismicity as related to the basal décollement that separates the volcanic edifice from the oceanic crust. The shallower seismicity is a feature exhibited in the recent activity and, which we propose, reveals a detachment that either represents the contact between Mauna Loa and Kīlauea volcanoes or coincides with the onland extension of the base of the Hilina slump. We suggest that large earthquakes, such as the 1975 Mw 7.7 and the 2018 Mw 6.9 mainshocks, are capable of triggering failures of both the basal décollement and the shallower surface. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Faulting; Volcanoes; Earthquake relocation; Focal mechanism; High-precision; Large earthquakes; Reverse faulting; Seismic evidence; Volcanic edifice; Volcano eruptions; Earthquakes; data interpretation; earthquake magnitude; earthquake trigger; extensional tectonics; faulting; focal mechanism; oceanic crust; precision; seismic response; seismicity; trigger mechanism; volcanic eruption; Hawaii [(ISL) Hawaiian Islands]; Hawaii [United States]; Hawaiian Islands; Kilauea; Mauna Loa
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169981
作者单位	Department of Marine Geosciences, Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL, United States; Department of Earth Sciences, School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, Honolulu, HI, United States
推荐引用方式 GB/T 7714	Lin G.,Okubo P.G.. Seismic Evidence for a Shallow Detachment Beneath Kīlauea's South Flank During the 2018 Activity[J],2020,47(15).
APA	Lin G.,&Okubo P.G..(2020).Seismic Evidence for a Shallow Detachment Beneath Kīlauea's South Flank During the 2018 Activity.Geophysical Research Letters,47(15).
MLA	Lin G.,et al."Seismic Evidence for a Shallow Detachment Beneath Kīlauea's South Flank During the 2018 Activity".Geophysical Research Letters 47.15(2020).