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：夏威夷地震的局地和远震研究 PI：塞西莉·沃尔夫 (Cecily Wolfe)，夏威夷大学 夏威夷的地震非常丰富，提供了有关该海洋热点岩浆和构造过程性质的关键信息。 有与岩浆侵入和喷发有关的浅地壳地震、中上岩石圈地幔的地震反映了岩浆迁移、缓解了火山生长和火山扩张造成的应力的地震。此外，神秘的地壳和地幔地震可能是由多种因素造成的，包括继承性结构薄弱区、火山载荷和岩石圈弯曲造成的应力、岩浆运动和热冷却应力。 该项目将进行两项研究：1）对远震记录的地震（Mw 4.5）进行波形建模，以约束整个夏威夷的地震机制和力矩，包括美国地质观测站夏威夷火山观测站地震网络几何结构不足以约束的许多地区。提供第一动作机制； 2）使用高精度技术重新定位特定目标的本地记录的地震活动。远震波形建模可产生准确的机制解决方案，而高精度重定位可产生准确的震源，两者相结合有望改善我们对夏威夷群岛地震构造的认识，并有助于评估地震危害。