Deep Geophysical Observatory in Long Valley Caldera

0080841 Sacks该合同为安装在长谷勘探井（在长谷破火山口钻一个3公里深的地球物理观测孔）中的集成井下传感器包的制造提供部分资金支持。自1980年以来，长谷火山口一直处于持续动荡之中，其特征是频繁发生地震群、圆顶状隆起、喷气活动水平增加以及通过其表层土壤排放的高浓度二氧化碳气体。将要建造的传感器包将包括一个应变计/应变计、地震仪和压力传感器。在深度和可能接近岩浆源的地方进行的测量组合，将允许以前所未有的灵敏度探测火山系统的变化。***

0080841Sacks This award provides partial funding support for the fabrication of an integrated downhole sensor package to be installed in the Long Valley Exploratory Well (a 3-kilometer deep hole drilled for geophysical observations in the Long Valley Caldera). Since 1980 the Long Valley Caldera has shown sustained unrest characterized by recurring earthquake swarms, dome-shaped uplift, and increased levels of fumarolic activity as well as high concentrations of CO2 gas emitted through its surface soils. The sensor package to be built will include a dilatometer/strainmeter, seismometers, and pressure sensors. The combination of measurements, made at depth and presumably close to the magmatic source, will allow probing of changes in the volcanic system with heretofore unprecedented sensitivity. ***