A Study of the Particle Velocity Recordings, Site ConditionsAnd Radiation Effects for the SE Illinois Earthquake of June 10, 1987

6月10日伊利诺斯州东南部发生的5.1毫巴Lg地震， 1987年在煤矿和石灰岩中触发了62个爆炸监测器 和西肯塔基州。 粒子速度的结果集 记录是任何自由场地面运动的最大样本 美国中部或东部的地震。 地震动中场地效应和震源效应的修正 示出了迹线以减少所得数据集的可变性。 场地效应基于浅层岩土工程勘察 进行测量以确定覆盖层的P波和S波速度 作为深度、基岩深度和基岩地形的函数。 震源效应的基础是震源机制、震源深度和 与6月10日地震有关的断层类型。 的 得到的场地和源校正的自由场粒子速度 记录，与随机振动分析和 理论上的考虑，产生了一个改进的模型，预测 美国中部地震诱发的地面运动 它的可变性比现有的模型要小得多。

The 5.1 mb,Lg southeastern Illinois earthquake of June 10, 1987 triggered 62 blast monitors in the coal mines and limestone and western Kentucky. The resulting set of particle velocity records is the largest sample of free-field ground motions of any earthquake in the central or eastern United States. Corrections for site and source effects in the ground motion traces are shown to reduce the variability in resulting data set. Site effects are based on shallow geotechnical investigations conducted to determine P- and S-wave velocities of the overburden as a function of depth, depth to bedrock, and bedrock topography. Source effects are based on the focal mechanism, focal depth, and type of faulting associated with the June 10th earthquake. The resulting site and source corrected free-field particle velocity records, used in conjunction with random vibration analysis and theoretical considerations, yeild an improved model for predicting seismically induced ground motions in the central United States that has appreciably less variability then existing models.