The Hot Dry Rock (HDR) site of Soultz-sous-Forêts in Alsace was chosen in 1986 for scientific investigations. During the first phase of the project (1987-1988), a first borehole GPK1 (https://cdgp.u-strasbg.fr/geonetwork/srv/fre/catalog.search#/metadata/SSF-GPK1) was drilled. It reached a final depth of 2000 m and various investigations were undertaken during that period. In December 1988, an injection test was made at the bottom zone of this borehole with a relatively low flow rate of 3.3 l/s for a period of three days. Induced seismicity recorded was detected by 3-axis geophone probes deployed in three old recovered oil wells at depth ranging from 850 to 1350 m. A small amount of the detected seismicity could be located and showed a trend to grow towards greater depths than the injection zone. The following report from BRGM in the link gives details about the experiments and presents the results about the seismic monitoring and the location of the events. Some hydraulic data are presented as well with figures.

Catalogue with hydraulic data from the article of Drif et al.(2024) at Soultz-sous-Forets 2010. For more detailed calculations, see the article Induced Seismicity Controlled by Injected Hydraulic Energy: the Case Study of the EGS Soultz-sous-Forets Site by Drif,K., Lengline, O., Kinscher, J., Schmitbuhl, J. (2024) (http://dx.doi.org/10.1029/2023JB028190) The data parameters are the following: Column 1:Time from start: 30/11/2009 23:00:00 Column 2: Time_from_start_injection: time elapsed since start of fluid injection [hours] Column 3: Mean of the depth events (whose magnitude > Mc) occurred during each hour [m] Column 4: Cumulative injected volume in [m3] Column 5: Cumulative hydraulic energy in [J] Column 6: Cumulative seismic moment (events whose magnitude > Mc) in [N.m] Column 7: The seismic moment associated to the largest event (whose magnitude > Mc) occurred to date in [N.m] Column 8: Cumulative radiated seismic energy (events whose magnitude > Mc) in [J] Column 9: Seismic Injection Efficiency defined as the ratio between Er_cum and W_hyd_cum Column 10: Cumulative seismic faulting energy (events whose magnitude > Mc) in [J] Column 11: Seismic faulting efficiency definied as the ratio between W_fault_cum and W_hyd_cum Last update of data: 07/05/2024

Catalogue with hydraulic data from the article of Drif et al.(2024) at Soultz-sous-Forets 2005. For more detailed calculations, see the article Induced Seismicity Controlled by Injected Hydraulic Energy: the Case Study of the EGS Soultz-sous-Forets Site by Drif,K., Lengline, O., Kinscher, J., Schmitbuhl, J. (2024) ( http://dx.doi.org/10.1029/2023JB028190) The data parameters are the following: Column 1: Time from start: 07/02/2005 18:00:00 Column 2: Time_from_start_injection: time elapsed since start of fluid injection [hours] Column 3: Mean of the depth events (whose magnitude > Mc) occurred during each hour [m] Column 4: Mean of flowrate during each hour [l/s] Column 5: Cumulative injected volume in [m3] Column 6: Cumulative hydraulic energy in [J] Column 7: Cumulative seismic moment (events whose magnitude > Mc) in [N.m] Column 8: The seismic moment associated to the largest event (whose magnitude > Mc) occurred to date in [N.m] Column 9: Cumulative radiated seismic energy (events whose magnitude > Mc) in [J] Column 10: Seismic Injection Efficiency defined as the ratio between Er_cum and W_hyd_cum Column 11: Cumulative seismic faulting energy (events whose magnitude > Mc) in [J] Column 12: Seismic faulting efficiency definied as the ratio between W_fault_cum and W_hyd_cum Last update of data: 07/05/2024

Velocity model and station corrections described in the PhD thesis of <b>N. Cuenot</b>, used to calculate location of microseismic events of his first catalogue of the 2000 stimulation episode at Soultz-sous-Forêts. N. Cuenot performed preliminary locations during his PhD using a modified version of the HYPOINVERSE program (Klein, 1978). An initial velocity model established by Darnet (2000) was first used but did not give satisfactory results. The velocity model was thus refined. P waves velocities were iteratively calculated by minimizing residual errors at the stations. The ratio Vp/Vs was similarly adjusted in the sedimentary layers. At least, station corrections were used to get hypocenters as precise as possible. The first catalogue of events of the 2000 episode calculated by N. Cuenot using the HYPOINVERSE program is available (https://cdgp.u-strasbg.fr/geonetwork/srv/fre/catalog.search#/metadata/SSFS2000-catalogue). Last update of data: 26/11/2018

Catalogue with hydraulic data from the article of Drif et al.(2024) at Soultz-sous-Forets 1995. For more detailed calculations, see the article Induced Seismicity Controlled by Injected Hydraulic Energy: the Case Study of the EGS Soultz-sous-Forets Site by Drif,K., Lengline, O., Kinscher, J., Schmitbuhl, J. (2024) (http://dx.doi.org/10.1029/2023JB028190) The data parameters are the following: Column 1: Time from start: 17/06/1995 10:00:00 Column 2: Time_from_start_injection: time elapsed since start of fluid injection [hours] Column 3: Mean of the depth events (whose magnitude > Mc) occurred during each hour [m] Column 4: Mean of flowrate during each hour [l/s] Column 5: Cumulative injected volume in [m3] Column 6: Cumulative hydraulic energy in [J] Column 7: Cumulative seismic moment (events whose magnitude > Mc) in [N.m] Column 8: The seismic moment associated to the largest event (whose magnitude > Mc) occurred to date in [N.m] Column 9: Cumulative radiated seismic energy (events whose magnitude > Mc) in [J] Column 10: Seismic Injection Efficiency defined as the ratio between Er_cum and W_hyd_cum Column 11: Cumulative seismic faulting energy (events whose magnitude > Mc) in [J] Column 12: Seismic faulting efficiency definied as the ratio between W_fault_cum and W_hyd_cum Last update of data: 07/05/2024

Temperature logs recorded at GPK1 (https://cdgp.u-strasbg.fr/geonetwork/srv/fre/catalog.search#/metadata/SSF-GPK1) well and GPK2 (https://cdgp.u-strasbg.fr/geonetwork/srv/fre/catalog.search#/metadata/SSF-GPK2) well during the 1996 hydraulic programme. *Depth is given in meters *Temperature is given in °C Date of the measures for GPK1 logs: 09/09/1996 12/09/1996 19/09/1996 22/09/1996 23/09/1996 24/09/1996 25/09/1996 17/10/1996 19/10/1996 Date of the measures for GPK2 logs: 14/10/1996 (3 logs) 20/10/1996 More detailed information is given in the header of each file. Last update of data: 06/06/2019

Seismological signals acquired at Vendenheim during the development phase of the GEOVEN geothermal project. Waveforms from the permanent stations described in VDHD-Surface_network (https://cdgp.u-strasbg.fr/geonetwork/srv/fre/catalog.search#/metadata/VDHD-Surface_network) are provided for each event from VDHD-Catalogue (https://cdgp.u-strasbg.fr/geonetwork/srv/fre/catalog.search#/metadata/VDHD-Catalogue), (-30s, +90s). Data are automatically computed at request time

Hydraulic data recorded at GPK1, GPK2, GPK3, GPK4 and EPS1 during the 2004 hydraulic program. Two datasets are available: SSFS2004-Hydraulic_injection.csv: hydraulic data from 07/09/2004 to 12/09/2004 during the low flow injection test at GPK4 SSFS2004-Hydraulic_stimulation.csv: hydraulic data from 12/09/2004 to 02/10/2004 during the stimulation test at GPK4 The data parameters for the file SSFS2004-Hydraulic_injection.csv are the following: Column 1: Date and time (UTC) Column 2: Qin_MeSy - GPK4 injection flowrate Column 3: Vin - Cumulative volume of injected fluid Column 4: Tin_MeSy - Temperature of injected fluid Column 5: WL_Tank - Water level in the tank * Column 6: P_Tank - Pressure in the tank * Column 7: Rho_Tank - Density of injected fluid Column 8: Pw3 - GPK3 wellhead pressure Column 9: Pan3 - GPK3 annulus pressure Column 10: Pw2 - GPK2 wellhead pressure Column 11: Pan2 - GPK2 annulus pressure Column 12: Pw4 - GPK4 wellhead pressure Column 13: Pan4 - GPK4 annulus pressure Column 14: Pan_EPS1 - EPS1 annulus pressure The data parameters for the file SSFS2004-Hydraulic_stimulation.csv are the following: Column 1: Date and time (UTC) Column 2: Qin_omega - GPK4 injection flowrate Column 3: Vin - Cumulative volume of injected fluid Column 4: Qout - GPK3 production flowrate Column 5: Vout - Cumulative volume of produced fluid Column 6: Tin_omega - Temperature of injected fluid Column 7: Tout2 - Temperature of produced fluid Column 8: Tout3 - Temperature of produced fluid (other sensor) Column 9: WL_Tank - Water level in the tank * Column 10: P_Tank - Pressure in the tank * Column 11: Rho_Tank - Density of injected fluid Column 12: Pw3 - GPK3 wellhead pressure Column 13: Pan3 - GPK3 annulus pressure Column 14: Pw2 - GPK2 wellhead pressure Column 15: Pan2 - GPK2 annulus pressure Column 16: Pw4 - GPK4 wellhead pressure Column 17: Pan4 - GPK4 annulus pressure Column 18: Pan_EPS1 - EPS1 annulus pressure Column 19: Pwc1 - GPK1 wellhead pressure Column 20 : Pan1 - GPK1 annulus pressure * The tank was used as a buffer for injection fluid. Last update of data: 31/10/2018

Hydraulic data recorded at GPK1 (https://cdgp.u-strasbg.fr/geonetwork/srv/fre/catalog.search#/metadata/SSF-GPK1), GPK2 (https://cdgp.u-strasbg.fr/geonetwork/srv/fre/catalog.search#/metadata/SSF-GPK2) and EPS1 (https://cdgp.u-strasbg.fr/geonetwork/srv/fre/catalog.search#/metadata/SSF-EPS1)(Soultz-sous-Forêts) during 1995 stimulation, injection and circulation tests. 5 datasets are available: SSFS1995-Hydraulic_June: Flowrate, pressure and temperature data recorded from 10:05 06/06/95 to 23:59 30/06/95 during the two injection tests, the short term stimulation experiment and the long term stimulation experiment at GPK2. SSFS1995-Hydraulic_July: Flowrate, pressure and temperature data recorded from 00:00 01/07/95 to 10:20 29/07/95 during the stepped post-fracturing injection test at GPK2 and during the first circulation test between GPK1 and GPK2. SSFS1995-Hydraulic_August: Flowrate, pressure and temperature data recorded from 11:24 29/07/95 to 09:15 22/08/95 during the two last circulation tests between GPK1 and GPK2. SSFS1995-Hydraulic_GPK1_June_July: Downhole temperature and pressure data recorded at GPK1 from 02:16 26/06/95 to 09:24 03/07/95 during the end of the long term stimulation experiment and the stepped post-fracturing injection test at GPK2. SSFS1995-Hydraulic_GPK1_August: Downhole temperature and pressure data recorded at GPK1 from 17:09 15/08/95 to 13:08 20/08/95 during the third circulation test experiment between GPK1 and GPK2. SSFS1995-Hydraulic_GPK2_June_July: Downhole temperature and pressure data recorded at GPK2 from 16:12 16/06/95 to 13:24 10/07/95 during the long term stimulation experiment at GPK2, the stepped post-fracturing injection test at GPK2 and during the beginning of the first circulation test between GPK1 and GPK2. SSFS1995-Hydraulic_GPK2_August: Downhole temperature and pressure data recorded at GPK2 from 16:42 30/07/95 to 09:17 21/08/95 during the third circulation test between GPK1 and GPK2. Last update of data: 29/01/2020

Before the 2003 episode, a permanent network designed to monitor the microseismic activity at Soultz-sous-Forêts was installed by EOST (Ecole et Observatoire des Sciences de la Terre) from the Strasbourg University. It consisted of nine stations, six one-component and three three-component sensors. The network was operational just before the 2003 stimulation of GPK3 (https://cdgp.u-strasbg.fr/geonetwork/srv/fre/catalog.search#/metadata/SSF-GPK3). A temporary network of fourteen seismometers (six three-component and eight one-component) was added to this permanent network. Contrary to the 2000 episode, all the fourteen stations of the temporary network were continuously recording. In addition to the network under the responsibility of EOST, a broad-band Güralp sensor was used mostly for waveform analysis. Two other accelerometers completed the surface monitoring system too. The coordinates of the stations have been obtained from RESIF (https://www.resif.fr/">https://www.resif.fr). Last update of data: 03/02/2020