Deephole Three Component Seismic Observations at Cajon Pass, California

本研究是将一个三分量地震计放置在深部 在卡洪山口的钻孔里 在3.5公里深的钻孔处， 这一点很重要，因为这是一个地震活动区 以及对当地地震事件的深层采样 增加了我们对P-和S-组成部分的理解， 不受干扰的地壳中的波地震谱和地震尾波 近地表现象 如果空间和时间统计 地震发生的特性，例如b值和 尾波Q，包含重要的地震信息， 最干净的地震图样本集可从放置在 在深度。 这项研究是国家 减少地震灾害计划。

This research is to emplace a 3-component seismometer at depth in the Cajon Pass borehole. At the 3.5 km depth of the borehole, this is important because this is a zone of seismogenic activity in crystalline rock, and deep sampling of local seismic events increases our understanding of the components of the P- and S- wave seismic spectra and the seismic coda in crust undisturbed by near surface phenomena. If spatial and temporal statistical properties of earthquake occurrence, for example, b-values and coda Q, contain important precursory information, the largest and cleanest seismogram sample set is available from sensors placed at depth. This research is a component of the National Earthquake Hazard Reduction Program.