Local and Teleseismic Studies of Hawaiian Earthquakes

题目：夏威夷地震的局地和远震研究美国地震局：Cecily Wolfe，夏威夷大学夏威夷地震丰富，为研究这一海洋热点地区岩浆和构造过程的性质提供了关键信息。浅层地壳地震与岩浆侵入和喷发有关，中上层岩石圈地幔地震反映岩浆迁移，火山生长和火山扩张释放应力的地震。此外，还有一些神秘的地壳和地幔地震，这些地震可能是由多种因素引起的，包括继承的构造软弱带、火山负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地震力矩，包括美国地质观测站夏威夷火山观测站地震台网几何结构不足以提供初动机制的许多地区；2)利用高精度技术重新定位当地记录的特定目标的地震活动。将远震波形建模与高精度重新定位相结合，可以获得精确的机制解决方案和精确的震源，从而改善我们对夏威夷群岛地震构造的看法，并有助于评估地震危害。

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.