Explosive Eruptions With Little Warning: Experimental Petrology and Volcano Monitoring Observations From the 2014 Eruption of Kelud, Indonesia
Explosive Eruptions With Little Warning: Experimental Petrology and Volcano Monitoring Observations From the 2014 Eruption of Kelud, Indonesia
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几乎没有任何预警的爆炸性喷发:2014 年印度尼西亚 Kelud 火山喷发的实验岩石学和火山监测观测
DOI:
10.1029/2018gc008161
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Cassidy M
中科院分区:
文献类型:
--
作者:
Cassidy M
Explosive eruptions that occur with little or no precursory unrest (less than a month) pose the greatest hazards from volcanoes to nearby populations. Here we focus on the preeruptive conditions for these explosive events, their triggers and how these eruptions evolve. We concentrate on Kelud volcano, where we have conducted a set of petrological experiments to understand preeruptive storage conditions for several recent eruptions. For the 2014 explosive eruption, we combine this with an analysis of interferometric synthetic aperture radar measured deformation. Our data suggest that both explosive and effusive eruptions at Kelud are sourced from a magma storage system at 2–4 km. However, explosive eruptions are fed by magma stored under relatively cool (~1000 °C) and water‐saturated conditions, whereas effusive eruptions are fed by slightly hotter (~1050 °C), water‐undersaturated magmas. We propose that the initial phase of the 2014 eruption was triggered by volatile overpressure, which then fostered top‐down decompression tapping discrete magma bodies. By compiling a global data set of monitoring signatures of explosive eruptions, we show that the onset of unrest rarely points to the shallow ascent of magma to the surface, as ascent mostly occurs in a matter of hours or minutes. We relate the timescale of preeruptive unrest to eruption triggering mechanisms, with yearly/decadal periods of unrest relating to magma injection events (which may or may not precede a magmatic eruption), whereas internal triggering (e.g., second boiling) of an already present, cooling magma body can lead to explosive eruptions with little warning.
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DOI:
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发表时间:
1998
期刊:
影响因子:
--
作者:
J. Thouret;K. Abdurachman;J. Bourdier;S. Bronto
通讯作者:
S. Bronto
影响因子:
3.5
作者:
W. Marzocchi;M. Bebbington
通讯作者:
M. Bebbington
影响因子:
3.9
作者:
S. Couch;R. Sparks;M. Carroll
通讯作者:
M. Carroll
影响因子:
5.2
作者:
J. Barclay;M. Rutherford;M. Carroll;M. Murphy;J. Devine;J. Gardner;R. Sparks
通讯作者:
R. Sparks
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
East Java
通讯作者:
East Java