Local and Teleseismic Studies of Hawaiian Earthquakes

夏威夷地震的局地和远震研究

• 批准号: 0106537
• 负责人: Cecily Wolfe
• 金额: --
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-07-01 至 2007-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0106537&HistoricalAwards=false
• 关键词: Local; Teleseismic; Studies; Hawaiian; Earthquakes

Abstract for proposal EAR0106537 (PH #57x)Title: Local and teleseismic studies of Hawaiian earthquakesPI's: Cecily Wolfe, Univ HawaiiEarthquakes in Hawaii are abundant, and provide key information on the nature of magmatic and tectonic processes at this oceanic hotspot. There are shallow crustal earthquakes associated with magma intrusions and eruptions, earthquakes in the middle-to-upper lithospheric mantle suggested to reflect magma migration, earthquakes that relieve stresses due to volcano growth and volcano spreading. In addition, there are enigmatic crustal and mantle earthquakes that may be due to a variety of factors, including inherited zones of structural weakness, stresses due to volcano loading and lithospheric flexure, magma movement, and thermal cooling stresses. This project will conduct two studies: 1) waveform modeling of teleseismically-recorded earthquakes (Mw 4.5) in order to constrain earthquake mechanisms and moments throughout Hawaii, including in many regions where the United States Geological Observatory Hawaii Volcano Observatory seismic network geometry is insufficient to provide a first-motion mechanism; and 2) the relocation of locally-recorded seismicity for specific targets using high-precision techniques. The combination of teleseismic waveform modeling to yield accurate mechanism solutions and high precision relocations to yield accurate hypocenters promise to improve our view of the seismotectonics of the Hawaiian Islands and will aid in the evaluation of earthquake hazards.

提案EAR 0106537（PH #57x）标题摘要：夏威夷地震的局部和局部研究PI：Cecily Wolfe，夏威夷大学夏威夷的地震非常丰富，并提供了有关该海洋热点岩浆和构造过程性质的关键信息。 存在与岩浆侵入和喷发相关的浅地壳地震、反映岩浆迁移的岩石圈中上部地幔地震、释放火山生长和火山扩张引起的应力的地震。此外，还有神秘的地壳和地幔地震，可能是由于各种因素，包括继承的结构薄弱区，由于火山负荷和岩石圈弯曲，岩浆运动和热冷却应力的应力。 本计画将进行两项研究：1）地震记录波形模拟（Mw 4.5），以约束整个夏威夷的地震机制和力矩，包括在美国地质观测站夏威夷火山观测站地震网络几何形状不足以提供第一运动机制的许多区域;二是利用高精度技术对特定目标的本地记录地震活动进行重新定位。结合地震波波形建模，以产生准确的机制的解决方案和高精度的重新定位，以产生准确的震源，承诺改善我们的夏威夷群岛的地震构造的看法，并将有助于地震危险性的评估。