Expansion of the Permanent GPS Network on Kilauea Volcano

9902903 Segall这笔赠款提供部分支持，用于购买和纪念两个连续记录的全球定位卫星接收器(CGPS)，以便永久部署在夏威夷的基拉韦厄火山。这将扩大基拉韦厄的现有全球定位系统接收器网络，以监测与基拉韦厄东部裂谷带南侧的断层滑动和地下岩浆活动有关的持续变形。大地测量数据将与美国地质调查局以前支持的GPS、地震和倾斜仪数据一起用于模拟基拉韦厄火山下面的构造地质、岩浆室形状、大小和火山管道动力学；一座火山继续活跃，最近发生了许多大地震，由于有证据表明南侧快速断层滑动，可能在未来产生毁灭性的海啸。基拉韦厄火山上的网络扩大之前，对火山变形进行了八年的空间大地测量监测，并对火山进行了地震监测。南侧最近的地震活动已沿东裂谷带迁移，远离现有的GPS网。大地测量和地震的综合解释表明，这种变形和地震能量的来源是岩脉注入，而不是岩浆室膨胀。这一网络的扩展将填补大地测量数据中的一些明显空白。连续的GPS数据应该能够记录任何形变速率变化，而现在这些变化可能只与来自该新活动区的离散的运动GPS数据相混淆，而且无论如何都将提供宝贵的数据来源，帮助我们了解活动热点火山上的火山变形和地下岩浆动力学。

9902903SegallThis grant provides partial support for the costs of acquiring and monumenting two continuously recording global positioning satellite receivers (CGPS) for permanent deployment on Kilauea Volcano, Hawaii. This will expand an existing network of GPS receivers on Kilauea to monitor ongoing deformation associated with fault slip on the south flank of Kilauea's east rift zone and subsurface magmatic activity. The geodetic data would be used in conjunction with previously USGS supported GPS, seismic and tilt meter data to model the structural geology, magma chamber shape, size and volcanic plumbing dynamics beneath Kilauea; a volcano that continues to be active, has produced many recent large earthquakes, and due to evidence of rapid fault slip on the south flank, could produce a devastating tsunami in the future.The expansion of the network on Kilauea follows eight years of prior space geodetic monitoring of volcanic deformation and seismic monitoring of the volcano. Recent seismic activity on the south flank has migrated along the east rift zone, away from the existing GPS network. Combined geodetic and seismic interpretation suggest dike injection and not magma chamber inflation as the source of this deformation and seismic energy. This expansion of the network will fill some obvious gaps in the geodetic data.Continuous GPS data should be able to document any deformation rate changes that might now be aliased with only discrete, campaign GPS data from this area of new activity and in any event will provide a valuable source of data to help us understand volcanic deformation and subsurface magmatic dynamics on an active hotspot volcano.