GRT-2 is the second well drilled within the framework of the geothermal project ECOGI at Rittershoffen. The drilling of the well started in March 2014 and ended in July 2014. GRT-2 is a deviated well of 3196 m in length that reaches 2708 m TVD GL (true vertical depth from ground level) within the fractured granite basement. No reservoir enhancement was necessary at GRT-2. Production and circulation tests were realized from July to October 2014. The GRT-2 well is currently used as production well. It produces hot water at a temperature of 170 °C and with production flow rate of 70 L/s. Location of the GRT-2 wellhead (in WGS84): Latitude: 48.8970814354199° Longitude: 7.93865503246575°

GRT-1 is the first well drilled within the framework of the geothermal project ECOGI at Rittershoffen. The drilling of the well began at the end of September 2012. The well reached a final measured depth of 2580 m within the fractured granite basement at the end of December 2012. Hydraulic tests of the well were carried out from December 2012 to June 2013. The tests realized at GRT-1 allowed to increase its injectivity index by a factor five. The GRT-1 well is currently used as injection well. Location of the GRT-1 wellhead (in WGS84): Latitude: 48.8965633979049 Longitude: 7.93818621036716

Microseismic catalogue of the surface network recorded at Rittershoffen during the field operations between 2012 and 2014. Calculated by ÉS-Géothermie. Number of events: 1348. The microseismic events were recorded during the drilling of the two wells and the hydraulic tests realized at GRT-1. No seismic event was recorded during the hydraulic tests realized at GRT-2. Time period: 29/11/2012 22:23:32 to 26/05/2014 23:43:55. The data parameters are the following: Column 1: Date Column 2: Origin time (UTC) Column 3: Easting in extended Lambert II coordinate system Column 4: Northing in extended Lambert II coordinate system Column 5: Latitude in WGS84 coordinate system * Column 6: Longitude in WGS84 coordinate system * Column 7: Depth (true vertical depth below sea level) Column 8: Local magnitude (vertical component) Column 9: Azimuth of the small uncertainty axis Column 10: Dip of the small uncertainty axis Column 11: Azimuth of the middle uncertainty axis Column 12: Dip of the middle uncertainty axis Column 13: Smallest uncertainty Column 14: Middle uncertainty Column 15: Largest uncertainty Column 16: Recorded period (0-GRT-1 drilling, 1-GRT-1 thermal stimulation, 20-GRT-1 hydraulic stimulation, 21-GRT-1 burst of seismicity and 3-GRT-2 drilling) * Latitude and longitude in the WGS84 coordinate system have been derived from easting and northing in extended Lambert II. Original data from Maurer et al., 2020 https://doi.org/10.1186/s40517-020-0155-2

Seismological signals acquired during the development phase of the geothermal project at Rittershoffen. Waveforms from the permanent stations described in RITD-Surface_network (https://cdgp.u-strasbg.fr/geonetwork/srv/eng/catalog.search#/metadata/RITD-Surface_network) are provided for each event from RITD-Catalogue (https://cdgp.u-strasbg.fr/geonetwork/srv/eng/catalog.search#/metadata/RITD-Catalogue), (-30s, +90s). All the waveforms from the temporary seismic network installed in 2013 and 2014 are available on the GFZ (German Research Centre for Geosciences) data services website.

Interval seismic velocities applied to the 3D velocity model. Vp, Vs and Vp/Vs values for each formation along GRT-1 well. Original data from Maurer et al., 2020

The microseismic monitoring at Rittershoffen began 6 months before any drilling. Four permanent stations were deployed at the surface in 2012 and completed the network of eight surface stations from the Soultz-sous-Forêts network. The permanent network is composed of one or three-components seismometers. A temporary network of 31 stations (TOPASE network) was deployed from June 2013 to November 2014 to improve the dectection and location of the seismic monitoring during the field development operations. The stations of the temporary network were three-component seismometers belonging to the Geophysical Instrument Pool Potsdam (GIPP) of the GFZ German Research Centre for Geosciences. Easting and northing in the file refer to the extended Lambert II Cartesian system. The latitude and longitude in the WGS84 coordinate system have been derived from the extended Lambert II Cartesian system. Original data from Maurer et al., 2020 https://doi.org/10.1186/s40517-020-0155-2

Focal mechanisms of seismic events, which occurred during the thermal and hydraulic stimulations, the 2013 July burst and the GRT-2 drilling. Two earthquakes per seismogenic period were considered. More information about the determination of the focal mechanisms and the selection of events is available in the article from Maurer, V. et al., 2020, Seismicity induced during the development of the Rittershoffen geothermal field, France. The data parameters are the following: Column 1: Period Column 2: Date Column 3: Time (UTC) Column 4: Easting (m) Column 5: Northing (m) Column 6: Depth (m TVD MSL) Column 7: Latitude (°) * Column 8: Longitude (°) * Column 9: Mlv Column 10: NPOL Column 11: Dip (°) Column 12: Strike (°) Column 13: Rake (°) * The latitude and longitude in the WGS84 coordinate system have been derived from the extended Lambert II Cartesian system. Original data from Maurer et al., 2020

The ECOGI powerplant (https://geothermie.es.fr/en/references/projet-ecogi) is a geothermal powerplant designed by ÉS-Géothermie and located at Rittershoffen in northern Alsace, 7 km southeast of Soultz-sous-Forêts. The geothermal plant of Rittershoffen is operating since mid-2016 and produces 24 MWth of thermal power, with a production temperature of 170 °C. The geothermal heat production is directly used by a biorefinery located at Benheim. Two wells ensure the production and reinjection of the geothermal fluid. The development of the deep geothermal field took place between 2012 and 2014. Several earthquakes occurred between 2012 and 2014 during the drilling of the two wells GRT-1 (https://cdgp.u-strasbg.fr/geonetwork/srv/fre/catalog.search#/metadata/RIT-GRT1) and GRT-2 (https://cdgp.u-strasbg.fr/geonetwork/srv/fre/catalog.search#/metadata/RIT-GRT2) and some of the hydraulic tests realized on site. The induced seismicity was recorded by a permanent and a temporary seismic network.