DOI: 10.1016/j.epsl.2018.03.052
Scopus记录号: 2-s2.0-85045215514
论文题名: Correlating the electrification of volcanic plumes with ashfall textures at Sakurajima Volcano, Japan
作者: Smith C.M. ; Van Eaton A.R. ; Charbonnier S. ; McNutt S.R. ; Behnke S.A. ; Thomas R.J. ; Edens H.E. ; Thompson G.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 492 起始页码: 47
结束页码: 58
语种: 英语
英文关键词: Sakurajima Volcano
; volcanic ash texture
; volcanic lightning
; volcano monitoring
; vulcanian eruption
Scopus关键词: Electric utilities
; Lightning
; Sakurajima
; Volcanic ash
; Volcanic lightning
; Volcano monitoring
; vulcanian eruption
; Volcanoes
; detection method
; electrification
; lightning
; mantle plume
; monitoring
; texture
; volcanic ash
; volcanic eruption
; Japan
; Kagoshima [Kyushu]
; Kyushu
; Sakurajima
英文摘要: Volcanic lightning detection has become a useful resource for monitoring remote, under-instrumented volcanoes. Previous studies have shown that the behavior of volcanic plume electrification responds to changes in the eruptive processes and products. However, there has not yet been a study to quantify the links between ash textures and plume electrification during an actively monitored eruption. In this study, we examine a sequence of vulcanian eruptions from Sakurajima Volcano in Japan to compare ash textural properties (grain size, shape, componentry, and groundmass crystallinity) to plume electrification using a lightning mapping array and other monitoring data. We show that the presence of the continual radio frequency (CRF) signal is more likely to occur during eruptions that produce large seismic amplitudes (>7 μm) and glass-rich volcanic ash with more equant particle shapes. We show that CRF is generated during energetic, impulsive eruptions, where charge buildup is enhanced by secondary fragmentation (milling) as particles travel out of the conduit and into the gas-thrust region of the plume. We show that the CRF signal is influenced by a different electrification process than later volcanic lightning. By using volcanic CRF and lightning to better understand the eruptive event and its products these key observations will help the monitoring community better utilize volcanic electrification as a method for monitoring and understanding ongoing explosive eruptions. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109896
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: University of South Florida, School of Geosciences, Tampa, FL, United States; U.S. Geological Survey, Cascades Volcano Observatory, Vancouver, WA, United States; Los Alamos National Laboratory, Los Alamos, NM, United States; New Mexico Institute of Mining and Technology, Department of Physics, Socorro, NM, United States
Recommended Citation:
Smith C.M.,Van Eaton A.R.,Charbonnier S.,et al. Correlating the electrification of volcanic plumes with ashfall textures at Sakurajima Volcano, Japan[J]. Earth and Planetary Science Letters,2018-01-01,492