Elastic Stress Transfer at Mauna Loa Volcano, Hawaii: Constraints from InSAR and Gravity Measurements

夏威夷莫纳罗亚火山的弹性应力传递：InSAR 和重力测量的限制

• 批准号: 0538237
• 负责人: Falk Amelung
• 金额: $ 35.7万
• 依托单位: University of Miami
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-02-01 至 2010-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0538237&HistoricalAwards=false
• 关键词: Elastic; Stress; Transfer; Mauna; Loa

This project funds the acquisition and analysis of new InSAR and gravity data for Mauna Loa volcano, Hawaii. The PIs will use the Canadian Radarsat satellite and multi-beam SAR imagery to optimally characterize the 3-D displacement field. The SAR data will be complemented by annual gravity surveys in the summit area. Using the new data and inversion methods the researchers will develop a time-dependent model for the magmatic plumbing system of the volcano. The combination of InSAR and gravity can resolve the geometry of the magma reservoir and whether the ongoing rift widening is caused by active intrusion of new magma or gravity-driven spreading. Data analysis is complemented by mechanical modeling of the volcano. The PIs will then use the InSAR-derived models of the magmatic system to evaluate changes of the stress field and whether changes in deformation sources are consistent with static stress change models. This will lead to a better understanding of earthquake processes, eruptions and flank instabilities on the volcano. The research will add to our knowledge of earthquake and volcanic hazards in Hawaii, as well as benefit the scientific community with the sharing of InSAR imagery through WinSAR.

该项目资助了夏威夷Mauna Loa火山的新内在的重力数据的收购和分析。 PI将使用加拿大Radarsat卫星和多光束SAR图像来最佳表征3D位移场。 SAR数据将与峰会区域的年度重力调查相辅相成。使用新的数据和反转方法，研究人员将为火山的岩浆管道系统开发一个时间依赖的模型。内部和重力的组合可以解决岩浆储层的几何形状，以及持续的裂谷是否是由新岩浆或重力驱动的扩散引起的。数据分析是通过火山的机械建模来补充的。然后，PI将使用岩浆系统的不衍生模型来评估应力场的变化以及变形源的变化是否与静态应力变化模型一致。这将使人们更好地了解火山上的地震过程，爆发和侧面不稳定性。这项研究将增加我们对夏威夷地震和火山危害的了解，并通过Winsar共享InSAR图像，从而使科学界受益。