气候变化领域集成服务门户(CCPortal): Seismic and geodetic progression of the 2018 summit caldera collapse of Kīlauea volcano

CCPortal

DOI	10.1016/j.epsl.2020.116250
	Seismic and geodetic progression of the 2018 summit caldera collapse of Kīlauea volcano
	Tepp G.; Hotovec-Ellis A.; Shiro B.; Johanson I.; Thelen W.; Haney M.M.
发表日期	2020
ISSN	0012821X
卷号	540
英文摘要	The 2018 eruption of Kīlauea volcano, Hawai'i, resulted in a major collapse of the summit caldera along with an effusive eruption in the lower East Rift Zone. The caldera collapse comprised 62 highly similar collapse cycles of strong ground deformation and earthquake swarms that ended with a magnitude 5 collapse event and one partial cycle that did not end with a collapse event. We analyzed geodetic and seismic data to better understand how the caldera collapse progressed over 3 months of activity, focusing on the cyclical activity. We identified 3 main phases of collapse: initial ring-fault activation and small explosions (Phase 1), an eastward shift in activity and freeing of the central piston (Phase 2), and a recoupling of the piston to the reservoir followed by relatively steady behavior until the eruption's end (Phase 3). Additionally, we observed geodetic evidence of tangential motion from the localization of the main ring fault (Phase 2) and the formation of a major peripheral ring fault on the eastern side of the collapse caldera during Phase 3. Both geodetic and seismic parameters suggest that the collapse may have had an eastward-component of motion after the ring fault system had formed. The cyclical seismic and geodetic parameters show no obvious signs that the collapse was coming to an end, with the only notable change being a significant increase in the ratio of cyclical displacement to co-collapse displacement observed during the last complete cycle on GNSS stations outside the caldera region. © 2020
关键词	basaltic volcanism caldera collapse volcanic eruption volcano geodesy volcano seismology
英文关键词	Geodesy; Pistons; Rings (components); Volcanoes; Basaltic volcanism; caldera collapse; Geodetic parameters; Ground deformations; Seismic parameters; Tangential motions; Volcanic eruptions; Volcano seismology; Earthquakes; basalt; caldera; deformation; earthquake swarm; geodesy; GNSS; seismic data; seismic method; seismology; volcanic eruption; volcanism; Hawaii [(ISL) Hawaiian Islands]; Hawaii [United States]; Hawaiian Islands; Kilauea
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/202931
作者单位	U.S. Geological Survey, Alaska Volcano Observatory, Anchorage, AK, United States; U.S. Geological Survey, California Volcano Observatory, Moffett FieldCA, United States; U.S. Geological Survey, Hawaiian Volcano Observatory, Hilo, HI, United States; U.S. Geological Survey, Cascades Volcano Observatory, Vancouver, WA, United States
推荐引用方式 GB/T 7714	Tepp G.,Hotovec-Ellis A.,Shiro B.,et al. Seismic and geodetic progression of the 2018 summit caldera collapse of Kīlauea volcano[J],2020,540.
APA	Tepp G.,Hotovec-Ellis A.,Shiro B.,Johanson I.,Thelen W.,&Haney M.M..(2020).Seismic and geodetic progression of the 2018 summit caldera collapse of Kīlauea volcano.Earth and Planetary Science Letters,540.
MLA	Tepp G.,et al."Seismic and geodetic progression of the 2018 summit caldera collapse of Kīlauea volcano".Earth and Planetary Science Letters 540(2020).