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首页> 外文期刊>Bulletin of the Seismological Society of America >Shear-wave velocity characterization of the USGS Hawaiian strong-motion network on the Island of Hawaii and development of an NEHRP site-class map
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Shear-wave velocity characterization of the USGS Hawaiian strong-motion network on the Island of Hawaii and development of an NEHRP site-class map

机译：夏威夷岛上USGS夏威夷强运动网络的横波速度表征和NEHRP站点级地图的开发

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To assess the level and nature of ground shaking in Hawaii for the purposes of earthquake hazard mitigation and seismic design, empirical groundmotion prediction models are desired. To develop such empirical relationships, knowledge of the subsurface site conditions beneath strong-motion stations is critical. Thus, as a first step to develop ground-motion prediction models for Hawaii, spectralanalysis-of-surface-waves (SASW) profiling was performed at the 22 free-field U.S. Geological Survey (USGS) strong-motion sites on the Big Island to obtain shear-wave velocity (V_S) data. Nineteen of these stations recorded the 2006 Kiholo Bay moment magnitude (M) 6.7 earthquake, and 17 stations recorded the triggered M 6.0 Mahukona earthquake. V_S profiling was performed to reach depths of more than 100 ft. Most of the USGS stations are situated on sites underlain by basalt, based on surficial geologic maps. However, the sites have varying degrees of weathering and soil development. The remaining strong-motion stations are located on alluvium or volcanic ash. V_(S30) (average V_S in the top 30 m) values for the stations on basalt ranged from 906 to 1908 ft/s [National Earthquake Hazards Reduction Program (NEHRP) site classes C and D], because most sites were covered with soil of variable thickness. Based on these data, an NEHRP site-class map was developed for the Big Island. These new VS data will be a significant input into an update of the USGS statewide hazard maps and to the operation of ShakeMap on the island of Hawaii.
机译：为了减轻地震灾害和设计地震的目的，评估夏威夷地震动的水平和性质，需要经验性地震动预测模型。为了建立这样的经验关系，了解强运动台下的地下场地条件至关重要。因此，作为开发夏威夷地面运动预测模型的第一步，在大岛上的22个自由场美国地质调查局（USGS）强运动站点进行了表面波频谱分析（SASW）剖析。获得横波速度（V_S）数据。这些站中有19个站记录了2006年的基霍洛湾6.7级地震，而有17个站记录了触发的6.0级Mahukona地震。进行了V_S剖析，以达到100英尺以上的深度。根据地表地质图，大多数USGS台站都位于玄武岩下的地点。但是，这些地点的风化程度和土壤发育程度不同。其余的强运动台位于冲积层或火山灰上。玄武岩台站的V_（S30）（最高30 m处的平均V_S）值在906至1908 ft / s（国家地震减灾计划（NEHRP）站点C和D级）范围内，因为大多数站点都被土壤覆盖厚度可变。基于这些数据，为大岛开发了NEHRP站点级地图。这些新的VS数据将是对USGS全州危害地图的更新以及ShakeMap在夏威夷岛上的运行的重要输入。

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