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.

提案摘要EAR0106537（pH＃57X）标题：夏威夷地震的本地和远距离研究：夏威夷的Cecily Wolfe，Univ Hawaiiearthquakes丰富，并提供有关此Oceanic Hotspot的Magmatic和构造过程的重要信息。 有与岩浆入侵和喷发有关的浅层地壳，中间到岩石圈地幔中的地震建议反映岩浆迁移，地震，这些地震减轻了由于火山的生长和火山蔓延而导致的压力。此外，可能是由于多种因素，包括结构无力的遗传区域，由于火山负荷和岩石圈弯曲，岩浆运动和热冷却应力引起的压力。 该项目将进行两项研究：1）远程医学录制地震（MW 4.5）的波形建模，以限制整个夏威夷的地震机制和时刻，包括在许多地区，在许多地区，美国夏威夷夏威夷火山天文台的隔音网络几何形状不足以提供第一运动机制； 2）使用高精度技术将局部录制的地震性迁移到特定目标。伸展波形建模的组合以产生准确的机制解决方案和高精度搬迁，以产生准确的低中心者有望提高我们对夏威夷群岛的震颤观念的看法，并将有助于评估地震危害。