A 70 3-component sensor deployment to monitor the 2020 EGS stimulation in Espoo/Helsinki, southern Finland - Dataset

The stations are part of a seismic network in the Helsinki capital area of Finland in 2020. The stations recorded the response to a second stimulation of a ∼ 6 km deep enhanced geothermal system in the Otaniemi district of Espoo that followed on the first larger stimulation in 2018. The second stimulation from 6 May to 24 May 2020 established a geothermal doublet system. The Institute of Seismology, University of Helsinki (ISUH), installed the 70 GIPP-provided geophones in addition to surface broadband sensors, ISUH-owned short-period instruments, and a borehole satellite network deployed by the operating company. The data set consists of raw CUBE-recorder data and converted MSEED data. The data set has been collected to underpin a wide range of seismic analysis techniques for complementary scientific studies of the evolving reservoir processes and the induced event properties. These should inform the legislation and educate the public for transparent decision making around geothermal power generation in Finland. The full 2020 network and with it the deployment of the CUBE stations is described in a Seismological Research Letter Data Mine Column by A. Rintamäki et al. (2021).

本数据集涉及的台站，为2020年芬兰赫尔辛基都会区地震台网的组成部分。这些台站记录了埃斯波市奥塔涅米区一处约6千米深的增强型地热系统（enhanced geothermal system）的第二次压裂响应，该系统的首次大规模压裂已于2018年完成。2020年5月6日至5月24日开展的第二次压裂，构建了一套地热双井系统（geothermal doublet system）。赫尔辛基大学地震学研究所（Institute of Seismology, University of Helsinki，ISUH）除布设自有短周期仪器、运营方部署的井下卫星台网以及地表宽频带传感器外，还安装了70台由GIPP提供的地震检波器（geophones）。本数据集包含原始CUBE记录仪数据与转换后的MSEED格式数据。本数据集的采集旨在支撑一系列地震分析技术的应用，以用于对动态演化的储层过程与诱发地震事件特征开展互补性科学研究。相关研究成果可为芬兰地热发电相关的立法提供参考，并向公众普及相关知识，以保障地热发电决策的透明性。2020年完整台网及CUBE台站的布设细节，已由A. Rintamäki等人于2021年发表在《地震研究快报》（Seismological Research Letter）的数据矿藏专栏中。