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

9711307 Devine蒙特塞拉特的Southfriere山火山于1995年7月18日开始喷发，因此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）已被喷发产物的近实时岩石学研究所补充，以便提供火山下岩浆储存区域的压力和温度条件、熔体挥发性含量以及岩浆从储层上升到地表的速度的估计。这些信息是至关重要的，因为挥发物含量和岩浆上升速度会影响火山的喷发方式。富水岩浆的快速上升导致爆发喷发，而缓慢上升导致被动脱气和喷涌喷发行为。1996年9月17日至18日，火山短暂地由喷流变为爆炸性喷发。喷发行为的变化是由于岩浆上升速率的增加。要求提供资金，使私人调查局能够继续进行岩石学研究，以估计从喷涌喷发到爆炸性喷发行为转变的可能性。

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.