Microseismic surface network - Soultz-sous-Forêts 2000 Stimulation

Description

The surface network was installed by EOST, University of Strasbourg, and contained different types of seismological stations. Three of them were permanent stations, belonging to the ReNaSS (French National Seismic Network) and designed to monitor the local, natural seismicity. One broad-band sensor (Güralp type) was also permanently installed at Soultz-sous-Forêts. In addition, fourteen temporary stations were set up during the stimulation test. Eight were continuously recording, telemetered, 1 Hz, single vertical seismometers. Five were autonomous three-component seismometers recording by triggering. Finally one three-component station (CARO) was also continuously recording (Cuenot et al., 2008, Analysis of the Microseismicity Induced by Fluid Injections at the EGS Site of Soultz-sous-Forêts (Alsace, France): Implications for the Characterization of the Geothermal Reservoir Properties).

The temporary stations of the surface network were removed on the 11th of July, five days after the shut-in of the GPK2 well. Unfortunately, several seismic events occurred after that date and were then only recorded by the permanent surface network.

The coordinates of the stations have been obtained from RESIF now Epos-France and from the Ph. D. of N. Cuenot (Réponse du granite fracturé de Soultz-sous-Forêts à des injections massives de fluide : Analyse de la microsismicité induite et du régime de contraintes).