Community seismic network: A dense array to sense earthquake strong motion
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图 1 帕萨迪纳地区的地震台网。红点为CSN台站，暗蓝为Netquake台站，浅蓝为强震动台站，绿点为南加州地震台网台站（SCSN）。大红点表示建筑物安装多个CSN传感器。CS平均台站间距为0.8 km。在这个地区其他强地面运动台站间距4 km。图中方框见图2
图 2 峰值加速度：左图是拉哈布拉（La Habra）地震，右图是卡斯塔伊奇（Castaic）地震。2014年3月29日的拉哈布拉5.1级地震，距图中心30 km，2015年2月4日的卡斯塔伊奇4.1级地震，距离70 km
图 5 Phidget（Class-C）加速度计和EpiSensor（Class-A）加速度计在帕萨迪纳PASC地震台记录MW5.1拉哈布拉地震的对比，两者记录的幅度和波形非常相似
图 6 云的动态资源计算。蓝色曲线显示对于一个大的远震事件（2012年8月14日的鄂霍次克海（Okhotsk）地震）每秒提取初动的数量负荷。红色曲线显示了处理分析这个事件所用处理器的数量，从开始的5到峰值的45，由于开始处理过程中的延时，处理器曲线使负载曲线滞后7 s。事件引起的负荷增强的持续时间大约在1 min内结束
图 7 地震和环境噪声在52层大楼的相关性。（a）距大楼70 km以外的4.1级地震的S波。（b）使用最底层作为参考环境噪声相关性结果。大楼从高到底的反射波表明两种剪切波的速度大约为200 m/s。（a）图还表示附加的反射波和高速波好像是沿着大楼钢结构框架传播的
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