Microseismic catalogue recorded by the EOPGS surface network and the downhole network at Soultz-sous-Forêts during the 1993 episode. The catalogue is part John Helm's thesis : The natural seismic hazard and induced seismicity of the European HDR (Hot Dry Rock) geothermal energy project at Soultz-sous-Forêts (Bas-Rhin, France), Appendix V. The events of the catalogue cover the 1st stimulation test, the 2nd packer test and the 2nd stimulation test of the 1993 episode. Number of events: 96. Time period: 07/09/1993 18:08:32 - 16/10/1993 19:56:43. The data parameters used are the following: Column 1: Seismic ID Column 2: EOPGS event number Column 3: CSMA file Column 4: CSMA event number Column 5: Date Column 6: Corrected origin time (UTC) Column 7: Easting from GPK1 wellhead * Column 8: Northing from GPK1 wellhead * Column 9: Depth from GPK1 wellhead * Column 10: Latitude WGS84 ** Column 11: Longitude WGS84 ** Column 12: Elevation WGS84 ** Column 13: Event magnitude Column 14: Seismic moment Column 15: Source radius * The local coordinate system is based on the UTM32 system. ** Latitude, longitude and elevation have been derived from easting, northing and depth from GPK1 wellhead. The EOPGS microseismic surface network is available (https://cdgp.u-strasbg.fr/geonetwork/srv/fre/catalog.search#/metadata/SSFS1993-surface_network). The microseismic downhole network is available (https://cdgp.u-strasbg.fr/geonetwork/srv/fre/catalog.search#/metadata/SSFS1993-network). The velocity model used is available (https://cdgp.u-strasbg.fr/geonetwork/srv/fre/catalog.search#/metadata/SSFS1993-velocity_model). Unfortunately the waveforms recorded by the surface network have been lost. Last update of data: 23/07/2019

After the deepening of well GPK1 (https://cdgp.u-strasbg.fr/geonetwork/srv/eng/catalog.search#/metadata/SSF-GPK1) to 3590m in 1992, an extensive stimulation program was performed in September and October 1993. GPK1 was stimulated with large scale hydraulic injections to investigate the behavior and the extension of large natural fractures detected previously. A total of 44000 m3 of water was injected during the two major stimulation tests. About 18700 microseismic events were detected during the stimulation program by the downhole and the surface network. Dates of the different tests of the 1993 hydraulic program covered by the data*: - First openhole stimulation test at GPK1: from 01/09/1993 to 22/09/1993 - Packer test at GPK1: from 01/10/1993 to 05/10/1993 - Second openhole stimulation test: from 11/10/1993 to 21/10/1993 *Some other tests of less importance and not covered by the data of the episode were realized in 1993. Details about these tests are available in Baria, R., 1996, The European HDR programme 1992-1995. The Episode contains the following datasets: - Microseismic catalogue of the downhole network with moment magnitude from CSMA - Soultz-sous-Forêts 1993 Stimulation (https://cdgp.u-strasbg.fr/geonetwork/srv/eng/catalog.search#/metadata/SSFS1993-Catalogue) - Microseismic catalogue of the surface and the downhole network with magnitude from J. Helm - Soultz-sous-Forêts 1993 Stimulation (https://cdgp.u-strasbg.fr/geonetwork/srv/eng/catalog.search#/metadata/SSFS1993-Catalogue_Helm) - Microseismic catalogue of the downhole network from S. Bourouis - Soultz-sous-Forêts 1993 Stimulation (https://cdgp.u-strasbg.fr/geonetwork/srv/eng/catalog.search#/metadata/SSFS1993-Catalogue_Bourouis) - Downhole seismological waveforms acquired during the 1993 stimulation (https://cdgp.u-strasbg.fr/geonetwork/srv/eng/catalog.search#/metadata/SSFS1993-seed) - Microseismic downhole network - Soultz-sous-Forêts 1993 Stimulation (https://cdgp.u-strasbg.fr/geonetwork/srv/eng/catalog.search#/metadata/SSFS1993-network) - Microseismic surface network - Soultz-sous-Forêts 1993 Stimulation (https://cdgp.u-strasbg.fr/geonetwork/srv/eng/catalog.search#/metadata/SSFS1993-surface_network) - Hydraulic data - Soultz-sous-Forêts 1993 Stimulation (https://cdgp.u-strasbg.fr/geonetwork/srv/eng/catalog.search#/metadata/SSFS1993-Hydraulic) - Velocity model used to locate seismic events from the surface network - Soultz-sous-Forêts 1993 Stimulation (https://cdgp.u-strasbg.fr/geonetwork/srv/eng/catalog.search#/metadata/SSFS1993-velocity_model) - Flow logs from Soultz-sous-Forêts - 1993 Stimulation (https://cdgp.u-strasbg.fr/geonetwork/srv/eng/catalog.search#/metadata/SSFS1993-flow) - Temperature and pressure measurements at fixed depths from Soultz-sous-Forêts - 1993 Stimulation (https://cdgp.u-strasbg.fr/geonetwork/srv/eng/catalog.search#/metadata/SSFS1993-pressure) - Temperature logs from Soultz-sous-Forêts - 1993 Stimulation (https://cdgp.u-strasbg.fr/geonetwork/srv/eng/catalog.search#/metadata/SSFS1993-temperature) - Microseismic catalogue with seismic moment and moment magnitude from Drif et al.(2024) - Soultz-sous-Forêts 1993 Stimulation (https://cdgp.u-strasbg.fr/geonetwork/srv/fre/catalog.search#/metadata/71f7c6ac-20f9-4f28-8812-fa7c86d95f4a) - Catalogue with hydraulic data from Drif et al.(2024)- Soultz-sous-Forêts 1993 Stimulation (https://cdgp.u-strasbg.fr/geonetwork/srv/fre/catalog.search#/metadata/b5144bc0-15a3-4847-8e97-d252b596fb7d)

During June/July 2000 a hydraulic stimulation program was conducted in the well GPK2 (https://cdgp.u-strasbg.fr/geonetwork/srv/eng/catalog.search#/metadata/SSF-GPK2) at the European Hot Dry Rock project, Soultz-sous-Forêts, France. The stimulation was performed over the openhole section of GPK2 from 4431 m measured depth (MD) to the bottom of the well at around 5084 m MD. A total of 27 800 m3 of water were injected. At the start of the stimulation 700 m3 of brine with a density of approximately 1.2 g/cc were injected in an effort to encourage downward growth of the stimulated region. The stimulation covered a period of 6 days. After a break of 7 days a post-fracturing, injection test was performed. Seismic monitoring continued for a further 11 days after the injection test (Dyer, B., 2001.Soultz GPK2 stimulation June/July 2000. Seismic monitoring report.). Dates of the different tests of the 2000 hydraulic program: - Stimulation test at GPK2: from 18:44 30/06/2000 to 16:33 06/07/2000. - Post-stimulation injection test at GPK2: from 10:09 13/07/2000 to 20:25 15/07/2000. The Episode contains several datasets which you can find further down the page in "Links".