DOI: 10.1002/grl.50176
论文题名: The effect of pre-existing craters on the initial development of explosive volcanic eruptions: An experimental investigation
作者: Taddeucci J. ; Valentine G.A. ; Sonder I. ; White J.D.L. ; Ross P.-S. ; Scarlato P.
刊名: Geophysical Research Letters
ISSN: 0094-9335
EISSN: 1944-9066
出版年: 2013
卷: 40, 期: 3 起始页码: 507
结束页码: 510
语种: 英语
英文关键词: Crater
; Explosion
; Explosive eruption
; High-speed
; Jet
Scopus关键词: Jets
; Volcanoes
; Crater
; Experimental investigations
; Explosion depth
; Explosive eruption
; High-speed
; Initial development
; Volcanic eruptions
; Volcanic explosions
; Explosions
; crater
; ejecta
; experimental study
; explosive volcanism
; geometry
; jet
; volcanic eruption
英文摘要: Most volcanic eruptions occur in craters formed by previous activity. The presence of a crater implies specific confinement geometries, variably filled by loose fragmental deposits, which are expected to exert a strong, yet poorly studied, control on the violent gas expansion that drives the eruption. Here we analyze patterns of ejection from buried explosions in analog experiments, in order to investigate how the presence of a crater and changes in explosion depth and intensity may affect the formation of eruptive ejecta jets. Results show that scaled depth (charge burial depth divided by the cubic root of charge energy) controls the velocity and, partly, spread angle of eruptive jets independently of the presence of a pre-existing crater. Conversely, for a fixed scaled depth, the presence of a pre-existing crater limits the development of a laterally expanding annulus of the jet. These results are directly applicable to interpretation of volcanic explosions. Key Points Analysis of ejection patterns from intra- and extra-crater buried explosions Velocity and spread angle of ejecta jet are sensitive to explosion scaled depth Radially expanding annulus of the jet is sensitive to pre-existing crater ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84878195273&doi=10.1002%2fgrl.50176&partnerID=40&md5=37626a9fab358672fbdfc06756b105cb
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6599
Appears in Collections: 气候减缓与适应
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作者单位: Istituto Nazionale di Geofisica e Vulcanologia (INGV), Via di Vigna Murata, 605, 00143 Rome, Italy
Recommended Citation:
Taddeucci J.,Valentine G.A.,Sonder I.,et al. The effect of pre-existing craters on the initial development of explosive volcanic eruptions: An experimental investigation[J]. Geophysical Research Letters,2013-01-01,40(3).