A New Look at Violent Strombolian Eruptions - Past Behavior and Future Potential

“猛烈的斯特龙博利式”喷发（VS），其特征是大量的火山灰产生和广泛的玄武岩熔岩流，是俯冲带环境中火山活动的一种常见形式。然而，这种活动最近很少受到火山学界的关注，部分原因是这些火山爆发并不完全符合现有的分类方案。为了提供一个更全面的物理了解VS爆发，教授。Cashman和Wallace（俄勒冈州大学）将与Rosi教授（比萨大学）和Delgado教授（墨西哥国立自治大学）合作，对帕里克利（1943年，墨西哥）和维苏威火山（1906年，意大利）的猛烈斯特龙博利火山喷发产生的沉积物进行比较和多学科调查。需要解决的重要问题包括岩浆挥发物在产生剧烈的斯特龙博利火山喷发中的作用、火山灰生成机制、喷发风格的快速转变以及爆炸和喷发（熔岩流）活动之间的特征关系。这项研究的更广泛的影响涉及到危险评估，因为斯特朗博利火山的剧烈爆炸产生的高灰分含量和大范围的扩散可能会造成严重的经济混乱，通过灰烬处理和空中交通的广泛中断的问题，如最近在山斯特朗博利火山的剧烈活动。意大利的埃特纳。由于这类活动在世界许多地方都有潜力，项目负责人设计了拟议工作的教育部分，以包括美国、墨西哥和意大利的学生，他们除了基础研究外，还将参与危险评估。

"Violent strombolian" eruptions (VS), characterized by voluminous ash production and extensive basaltic lava flows, are a common form of volcanic activity in subduction zone environments. However, this activity has received scant recent attention from the volcanological community, in part because these eruptions do not fit neatly into existing classification schemes. To provide a more comprehensive physical understanding of VS eruptions, Profs. Cashman and Wallace (University of Oregon) will collaborate with Prof. Rosi (University of Pisa) and Prof. Delgado (UNAM, Mexico) to conduct a comparative and multi-disciplinary investigation of deposits produced by well-described violent strombolian eruptions of Paricutin (1943, Mexico) and Vesuvius (1906, Italy). Important issues to be addressed include the role of magmatic volatiles in generating violent strombolian eruptions, mechanisms of ash generation, rapid transitions in eruption styles, and the characteristic relationship between explosive and effusive (lava flow) activity. The broader impacts of this study relate to hazard assessment, as the high ash content and large dispersal range generated by violent strombolian explosions may cause severe economic disruption through problems of ash disposal and extensive disruption of air traffic, as illustrated by recent violent strombolian activity at Mt. Etna, Italy. Because of the potential for this type of activity in many parts of the world, the PIs have designed the educational component of the proposed work to include American, Mexican and Italian students, who will be involved with hazard assessment in addition to basic research.