气候变化领域集成服务门户(CCPortal): Changes in Crater Geometry Revealed by Inversion of Harmonic Infrasound Observations: 24 December 2018 Eruption of Mount Etna; Italy

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DOI	10.1029/2020GL088077
	Changes in Crater Geometry Revealed by Inversion of Harmonic Infrasound Observations: 24 December 2018 Eruption of Mount Etna; Italy
	Watson L.M.; Johnson J.B.; Sciotto M.; Cannata A.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:19
英文摘要	In December 2018, Mount Etna (Italy) experienced a period of increased eruptive activity that culminated in a fissure eruption on the southeast flank. After the onset of the flank eruption, the peak frequency of the summit infrasound signals decreased while resonance increased. We invert infrasound observations for crater geometry and show that crater depth and radius increased during the eruption, which suggests that the flank eruption drained magma from the summit and that eruptive activity led to erosion of the crater wall. By inverting the entire infrasound amplitude spectra rather than just the peak frequency, we are able to place additional constraints on the crater geometry and invert for, rather than assume, the crater shape. This work illustrates how harmonic infrasound observations can be used to obtain high-temporal-resolution information about crater geometry and can place constraints on complex processes occurring in the inaccessible crater region during eruptive activity. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Earth sciences; Geophysics; Amplitude spectra; Complex Processes; Eruptive activity; Flank eruptions; High temporal resolution; Infrasound signals; Mount Etna , Italy; Peak frequencies; Geometry; crater; geometry; harmonic analysis; magma; observatory; volcanic eruption; Catania [Sicily]; Etna; Italy; Sicily
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/169619
作者单位	Department of Geophysics, Stanford University, Stanford, CA, United States; Department of Earth Sciences, University of Oregon, Eugene, OR, United States; Department of Geosciences, Boise State University, Boise, ID, United States; Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Etneo, Catania, Italy; Dipartimento di Scienze Biologiche, Geologiche e Ambientali-Sezione di Scienze della Terra, Università degli Studi di Catania, Catania, Italy
推荐引用方式 GB/T 7714	Watson L.M.,Johnson J.B.,Sciotto M.,et al. Changes in Crater Geometry Revealed by Inversion of Harmonic Infrasound Observations: 24 December 2018 Eruption of Mount Etna; Italy[J],2020,47(19).
APA	Watson L.M.,Johnson J.B.,Sciotto M.,&Cannata A..(2020).Changes in Crater Geometry Revealed by Inversion of Harmonic Infrasound Observations: 24 December 2018 Eruption of Mount Etna; Italy.Geophysical Research Letters,47(19).
MLA	Watson L.M.,et al."Changes in Crater Geometry Revealed by Inversion of Harmonic Infrasound Observations: 24 December 2018 Eruption of Mount Etna; Italy".Geophysical Research Letters 47.19(2020).