Wabash Valley Array Study

Recent paleoseimic evidence had shown there were 5-8 magnitude greater than 6 earthquakes in this region in the past 20,000 years. The study area has always been at the fringe of previously operated seismic networks. A focused, short-term deployment was designed to lower the detection threshold to determine seismicity rates for the region for comparison with estimates derived from paleoseismicity. we hoped to relate observed seismicity to faults mapped in the subsurface through new seismis reflection data made available to the Illlinois Basin Consortium.近年来的古地震（paleoseismic）证据表明，在过去2万年中，该区域曾发生过5至8次震级超过6级的地震。本研究区域始终处于此前已投入运行的地震台网（seismic network）的覆盖边缘地带。本次研究设计了针对性的短期台网布设方案，以降低地震检测阈值（detection threshold），精准测定该区域的地震活动率，用于与古地震学（paleoseismology）估算得到的相关结果进行对比。我们期望通过向伊利诺伊盆地联盟（Illinois Basin Consortium）开放的全新地震反射（seismic reflection）数据，将观测到的地震活动与地下已测绘的断层建立关联。