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.

该项目为获取和分析夏威夷莫纳罗亚火山新的干涉合成孔径雷达和重力数据提供资金。PI将使用加拿大雷达卫星和多波束合成孔径雷达图像，以最佳方式确定三维位移场的特征。合成孔径雷达数据将得到峰顶地区年度重力测量的补充。利用新的数据和反演方法，研究人员将为火山的岩浆管道系统开发一个随时间变化的模型。干涉合成孔径雷达和重力的结合可以解决岩浆库的几何形状，以及正在进行的裂谷扩大是由新岩浆的活跃侵入还是重力驱动的扩张造成的。火山的机械建模补充了数据分析。然后，研究员将使用国际干涉合成孔径雷达导出的岩浆系统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。这将导致更好地了解地震过程，火山爆发和侧翼不稳定性。这项研究将增加我们对夏威夷地震和火山灾害的了解，并通过WinSAR共享干涉合成孔径雷达图像，使科学界受益。