Collaborative Research: Interaction between Long Valley volcanism and deformation of the Hilton Block, Sierra Nevada, CA

加州的长谷破火山口是研究火山作用和构造相互作用的理想天然实验室。位于长谷破火山口以南的内华达州山脉地区的希尔顿街区是加州地震最活跃的地区之一。然而，最近的地震活动模式很难与观测到的区域应变或从简单的火山膨胀弹性模型计算的应力转移相一致。要了解这一地区火山活动和构造之间的联系，就需要更好地了解希尔顿地块的运动学和破火山口系统内的应力传递机制。调查人员将使用详细的GPS观测和简单的弹性模型来确定希尔顿街区变形的性质和分布。他们将开发有限元模型，解决时间和温度依赖的粘弹性效应，以进一步探索地震活跃的希尔顿区块内的变形如何与长谷火山活动联系在一起。

Koenig, ElissaEAR-0074069Long Valley caldera, California, is an ideal natural laboratory for the study of interaction between volcanism and tectonics. The Hilton Block - the area in the Sierra Nevada located south of Long Valley caldera - has been one of the most seismically active regions in California. However, patterns of recent seismicity are difficult to reconcile with the observed regional strain or with stress transfer calculated from simple elastic models of volcanic inflation. Understanding the connections between volcanism and tectonics in this region will require a better understanding of both the kinematics of the Hilton Block and the mechanics of stress transfer within the caldera system. The investigators will use detailed GPS observations and simple elastic models to determine the nature and distribution of deformation in the Hilton Block. They will develop finite element models that address time- and temperature-dependent viscoelastic effects to further explore how deformation within the seismically active Hilton Block is linked to Long Valley volcanism.