Anthropogenic earthquakes

To mitigate the induced seismic hazard we used thermo-hydro-mechanical (THM) models and linked these with statistical methods to the Forward Induced Seismic Hazard Assessment scheme (FISHA) (Hakimhashemi et al. 2014). In collaboration with RU5 "Georessources" we could confirm the predictions of the THM models and FISHA with a unique experiment in the underground rock laboratory Äspö in Sweden, where we performed multiscale injections to monitor the growth and emplacement of hydrofractures in great detail (Zang et al. 2017). The cyclic stimulation scheme of loading and unloading the fracturing net pressure led to a lower accompanied seismicity but simultaneously increased the permeability of the treated rock intervals. From all these experiences a specially adjusted protocol for a field experiment to be carried out at the geothermal site in Pohang, Republic of Korea, was developed within the European funded project DESTRESS.