DOI: 10.1002/2016GL069098
论文题名: Characterization of moderate ash-and-gas explosions at Santiaguito volcano, Guatemala, from infrasound waveform inversion and thermal infrared measurements
作者: De Angelis S. ; Lamb O.D. ; Lamur A. ; Hornby A.J. ; von Aulock F.W. ; Chigna G. ; Lavallée Y. ; Rietbrock A.
刊名: Geophysical Research Letters
ISSN: 0094-9599
EISSN: 1944-9330
出版年: 2016
卷: 43, 期: 12 起始页码: 6220
结束页码: 6227
语种: 英语
英文关键词: Santiaguito
; thermal infrared
; volcano infrasound
Scopus关键词: Acoustics
; Infrared radiation
; Waveform analysis
; Infrasound
; Infrasound signals
; Magma fragmentation
; Santiaguito
; Thermal infrared
; Thermal infrared imagery
; Volcanic eruptions
; Waveform inversion
; Volcanoes
英文摘要: The rapid discharge of gas and rock fragments during volcanic eruptions generates acoustic infrasound. Here we present results from the inversion of infrasound signals associated with small and moderate gas-and-ash explosions at Santiaguito volcano, Guatemala, to retrieve the time history of mass eruption rate at the vent. Acoustic waveform inversion is complemented by analyses of thermal infrared imagery to constrain the volume and rise dynamics of the eruption plume. Finally, we combine results from the two methods in order to assess the bulk density of the erupted mixture, constrain the timing of the transition from a momentum-driven jet to a buoyant plume, and to evaluate the relative volume fractions of ash and gas during the initial thrust phase. Our results demonstrate that eruptive plumes associated with small-to-moderate size explosions at Santiaguito only carry minor fractions of ash, suggesting that these events may not involve extensive magma fragmentation in the conduit. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84977528519&doi=10.1002%2f2016GL069098&partnerID=40&md5=8c0ab8a932144eaaaa0d1d3b050031e2
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10562
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: School of Ocean and Environmental Sciences, University of Liverpool, Liverpool, United Kingdom
Recommended Citation:
De Angelis S.,Lamb O.D.,Lamur A.,et al. Characterization of moderate ash-and-gas explosions at Santiaguito volcano, Guatemala, from infrasound waveform inversion and thermal infrared measurements[J]. Geophysical Research Letters,2016-01-01,43(12).