Stronger or longer: Discriminating between Hawaiian and Strombolian eruption styles
Stronger or longer: Discriminating between Hawaiian and Strombolian eruption styles
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DOI：
10.1130/g37423.1
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发表时间：
2016-02-01
期刊：
影响因子：
5.8
通讯作者：
Scarlato, P.
中科院分区：
文献类型：
--
作者：
Houghton, B. F.;Taddeucci, J.;Scarlato, P.
全球最弱的火山爆发——斯特龙博利火山爆发和夏威夷火山喷发，也是最常见的。然而，尽管经过一百多年的观察，仍然没有任何分类方法能够提供令人信服的定量方法来区分这两种风格。新的观测结果表明，这两种类型的喷发时间尺度截然不同，夏威夷喷发的持续时间比斯特龙博利喷发的持续时间长了大约 300-10,000 秒。这反映了浅层溶解的气体是否仍被困在喷发的岩浆中或与其分离的基本过程。我们在此提出一种基于事件持续时间（短暂爆炸与长时间喷泉）的分类方案，截止时间为 300 秒，将短暂的斯特龙博利爆炸与持续的夏威夷喷泉分开。
The weakest explosive volcanic eruptions globally, Strombolian explosions and Hawaiian fountaining, are also the most common. Yet, despite over a hundred years of observations, no classifications have offered a convincing, quantitative way of demarcating these two styles. New observations show that the two styles are distinct in their eruptive time scale, with the duration of Hawaiian fountaining exceeding Strombolian explosions by similar to 300-10,000 s. This reflects the underlying process of whether shallow-exsolved gas remains trapped in the erupting magma or is decoupled from it. We propose here a classification scheme based on the duration of events (brief explosions versus prolonged fountains) with a cutoff at 300 s that separates transient Strombolian explosions from sustained Hawaiian fountains.