Microearthquakes in St. Gallen

After the steady decrease in both the magnitude and frequency of seismic activity in St. Gallen following the earthquake with a magnitude of 3.5 on July 20, 2013, there has been a renewed increase in the number of microearthquakes since September 16, 2013. More than 225 such earthquakes have been registered (state 15.10.2013). The strongest, with a magnitude of 2.0, occurred on October 2, 2013. Earthquakes of this magnitude are very sporadically felt locally.

Product tests will be conducted from October, 15 until the end of the month. Seismicity around the borehole might rise again due to these tests.

The Swiss Seismological Service (SED) continues to monitor the geothermal borehole and the surrounding area and to keep the St. Gallen public utilities company (Sankt Galler Stadtwerke) and the public constantly informed about the seismic activity recorded.