Monitoring Geothermieprojekt Schlattingen

At the geothermal project Schlattingen/TG a borehole was sunk to 1.2km depth and stimulated with acid in early 2013. The Swiss Seismological Service monitored the acid stimulation with borehole and surface seismometers and in this way created a highly sensitive system for the detection of smallest fracture processes. The goal of the monitoring was to better understand the fundamental processes of a chemical stimulation, and to test if the analysis of tiny earthquakes can be used for the calibration of seismic hazard models to shorten the death times of traffic light systems. By comparing downhole and surface data, the performance of the different network and the attenuation of ambient seismic noise with depth will be investigated. In the framework of the project GEOBEST the results will be used to develop guidelines for the design of seismic monitoring networks.