In the northern Alpine foreland of southwest Germany, continuous microseismic activity is observed, with the potential for strong earthquakes up to magnitude 5 or even 6+. The StressTransfer network is designed to complement the existing seismic networks in three defined areas: the southern Upper Rhine graben, the Albstadt shear zone, and the central Molasse basin around the town of Bad Saulgau. The network monitors mainly the microseismic activity, and will allow us to study the related faults and the stress field. The network consists of 15 seismic broadband stations, five for each region that complement permanent and other temporary recording stations. The data‐quality analysis proves an overall good recording quality, despite the problems due to the densely populated area. Recording stations located inside the Upper Rhine graben are characterized by a relatively high‐noise level due to freeways and railways located nearby as well as sites on thick, partly unconsolidated fluvial sediments. The comparison of the I95 noise amplitude level at our recording stations with the double P‐wave onset amplitude of an exemplary ML 1.0 earthquake in 12 km distance reveals the ability to detect even lower‐magnitude events at most of the StressTransfer seismic stations. For six stations, it is difficult during daytime; at four stations, we are probably not able to detect comparable small events. From March to May 2020, we observe a reduction of the daily noise amplitude of 20%–30%, due to the severe restrictions related to the severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2) pandemic, giving us the chance to search for really low‐magnitude events. Our study demonstrates that a careful selection of recording sites allows to monitor faulting processes even in highly populated regions with unfavorable subsurface conditions. In addition, we record teleseismic waveforms at the new locations, to improve the resolution of deeper structures.

中文翻译：

---

应力传递地震网络-监测德国西南部北部高山前陆地震活动断层带的实验

在德国西南部的北部高山前陆，观察到连续的微地震活动，可能发生高达5级甚至6级以上的强烈地震。StressTransfer网络的设计是对三个定义区域中现有地震网络的补充：南部莱茵河上游en带，Albstadt剪切带和Bad Saulgau镇周围的中部Molasse盆地。该网络主要监视微地震活动，并将使我们能够研究相关的断层和应力场。该网络由15个地震宽带站组成，每个区域五个，与永久和其他临时记录站相辅相成。尽管存在人口稠密的问题，但数据质量分析证明总体记录质量良好。由于附近的高速公路和铁路以及厚厚的，部分未固结的河流沉积物所致，位于上莱茵河grab沟内的记录站的噪音水平相对较高。我们的记录站的I95噪声振幅水平与12公里距离内的典型ML 1.0地震的双P波起始振幅的比较表明，能够在大多数StressTransfer地震站检测甚至更低振幅的事件。对于六个车站，白天很难。在四个站点，我们可能无法检测到类似的小事件。从2020年3月至2020年5月，由于与严重急性呼吸综合征冠状病毒2（SARS-CoV-2）大流行相关的严格限制，我们观察到每日噪声幅度降低了20％–30％，使我们有机会搜索真正的低震级事件。我们的研究表明，即使在地下条件不利的人口稠密地区，仔细选择记录地点也可以监测断层过程。此外，我们在新位置记录了远震波形，以提高更深结构的分辨率。