SGER: Volcanic Hazard Assessment of the Soufriere Hills Volcano, Montserrat, W.I.

SGER：威斯康星州蒙特塞拉特苏弗里埃尔山火山的火山危害评估

• 批准号: 9711307
• 负责人: Joseph Devine
• 金额: $ 0.95万
• 依托单位: Brown University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-03-15 至 1998-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9711307&HistoricalAwards=false
• 关键词: SGER; Volcanic; Hazard; Assessment; Soufriere

9711307 Devine The Southfriere Hills Volcano in Montserrat began erupting on 18 July 1995, creating an urgent need for volcanic hazard assessment. normal components of hazard monitoring (seismicity, ground deformation, etc.) have been complemented by near real-time petrologic studies of eruption products in order to provide estimates of pressure and temperature conditions, and melt volatile content, in the magma storage region beneath the volcano, as well as the rate of magma ascent form that reservoir to the surface. Such information is critical because volatile content and magma ascent rate influence the eruptive style of a volcano. Rapid ascent of water-rich magmas leads to explosive eruptions, whereas slow ascent leads to passive degassing and effusive eruptive behavior. On 17-18 September 1996, the volcano changed briefly from effusive to explosive eruptive style. The change in eruptive behavior resulted from an increase in magma ascent rate. Funding is requested to allow the P.I. to continue petrologic studies that provide estimates of the likelihood of a transition from effusive to explosive eruption behavior.

9711307 Devine蒙特塞拉特的Southfriere山火山于1995年7月18日开始喷发，迫切需要进行火山危险评估。 灾害监测的正常组成部分（地震活动、地面变形等）对火山喷发产物进行的近实时岩石学研究补充了这些技术，以便提供火山下岩浆储存区的压力和温度条件、熔体挥发物含量以及岩浆从该储存区上升到地表的速度的估计数。 这类信息至关重要，因为挥发物含量和岩浆上升速度影响火山的喷发方式。 富水岩浆的快速上升导致爆炸性喷发，而缓慢上升导致被动脱气和喷出的喷发行为。 1996年9月17日至18日，该火山短暂地从喷涌式转变为爆发式喷发。 火山喷发行为的改变是由于岩浆上升速率的增加。 要求提供资金，以使P. I.继续进行岩石学研究，估计从喷溢到爆炸喷发行为转变的可能性。