3D velocity model of the Upper Rhine Graben, from Lengliné et al. (2023). Grids are +/-100km in X and Y directions around LatOrig=48.661660 and LongOrig=7.773860, (401 points @ 500m between points), and 0-50km in depth (101 points @ 500m). Data are in NonLinLoc (https://github.com/alomax/NonLinLoc) format.

GNSS data are recorded at REIC station at Vendenheim during VDHD Episode and are provided by the operator Fonroche. The data format is Rinex. The stations are described here (https://cdgp.u-strasbg.fr/geonetwork/srv/fre/catalog.search#/metadata/GNSS-Stations). See station location (https://cdgp.u-strasbg.fr/Obsnef-Gnss/situation.php) and data availability (https://cdgp.u-strasbg.fr/Obsnef-Gnss/teqc_heatmap.html?REIC).

Data used to generate the figures of the paper: Shu, Lengline and Schmittbuhl, Collective behavior of asperities before large stick-slip events. JGR. (DOI 10.1029/2023JB026696) This work has been published under the framework of the Interdisciplinary Thematic Institute - Geosciences for the Energy System Transition (ITI GeoT), part of the ITI 2021–2028 program of the University of Strasbourg, CNRS and Inserm, supported by IdEx Unistra (ANR-10-IDEX- 0002), and by SFRI-STRAT’US project (ANR ANR-20-SFRI-001) under the framework of the French Investments for the Future Program. The China Scholarship Council (CSC) grant 201906370056 awarded to Weiwei Shu. This work is licensed under a Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/)

Second catalogue calculated by N. Cuenot as part of his PhD thesis. The downhole network and the surface network were both used to locate events of the 2000 episode at Soultz-sous-Forêts. The catalogue contains 265 events with a magnitude superior to 1.3, with the parameters of the two nodal plans of the focal mechanism detemined using the FPFIT algorithm (Reasenberg and Oppenheimer, 1985)(not available if mechanism not well constrained). The catalogue covers only the stimulation test and not the post-injection test of the 2000 episode. The mean location error is assumed to be less than 50 m horizontally and about 80 m vertically. [see Chapters 6 and 7 and Annexe 1 of Cuenot's Thesis]. Seismic events of the catalogue were located using a tomographic inversion method (Thurber, 1983). The method allows a simultaneous inversion to retrieve both the seismic velocity parameters and the hypocentral parameters in a 3-D layered heterogeneous medium. The location takes into account the evolution of the velocity structure at each iteration. Time period: 30/06/2000 19:41:34 - 11/07/2000 01:14:49 (UTC). The data parameters are the following: Column 1: Event number Column 2: Date (UTC) Column 3: Time (UTC) Column 4: Easting from GPK1 wellhead * Column 5: Northing from GPK1 welhead * Column 6: Depth from GPK1 wellhead * Column 7: Latitude WGS84 ** Column 8: Longitude WGS84 ** Column 9: Elevation WGS84 ** Column 10: Magnitude determined from the seismic signal duration Column 11: Strike of the first nodal plan solution Column 12: Dip of the first nodal plan solution Column 13: Rake of the first nodal plan solution Column 14: Strike of the second nodal plan solution Column 15: Dip of the second nodal plan solution Column 16: Rake of the second nodal plan solution * The local coordinate system is based on the UTM32 system. ** Latitude, longitude and elevation have been derived from the local coordinate system. Remark: the signals from the Renass stations and the Güralp sensor of the surface network, and from the two hydrophones of the downhole network were not used to locate the events of the catalogue. The description of the surface network is available (https://cdgp.u-strasbg.fr/geonetwork/srv/fre/catalog.search#/metadata/SSFS2000-surface_network). The signals from the RéNaSS stations and the Güralp sensor of the surface network were not used to locate the events of the catalogue. The description of the downhole network is available (https://cdgp.u-strasbg.fr/geonetwork/srv/fre/catalog.search#/metadata/SSFS2000-downhole_network). the signals from the two hydrophones of the downhole network were not used to locate the events of the catalogue The associated velocity model is available (https://cdgp.u-strasbg.fr/geonetwork/srv/fre/catalog.search#/metadata/SSFS2000-Velocity_model_Cuenot_2). Last update of data: 04/06/2021;

Geoven (http://www.geoven.fr) is a geothermal powerplant project led by Fonroche Géothermie now Arverne (https://arverne.earth/). The project is implemented on the site of the Rhenan Ecoparc at Vendenheim, north of Strasbourg. The geothermal powerplant produced 6 MW of electrical energy and 40 MW of thermal energy. To this end, two wells were used to draw the hot water and reinject it at more than 4000 meters deep. The two wells VDH-GT1 (https://cdgp.u-strasbg.fr/geonetwork/srv/eng/catalog.search#/metadata/VDH-GT1) and VDH-GT2 (https://cdgp.u-strasbg.fr/geonetwork/srv/eng/catalog.search#/metadata/VDH-GT2) had been drilled and some tests had been conducted (5 injectivity and productivity cycles between 02/2018 and 11/2019). A first interruption occured after a first period of seismicity (11/2019 – 01/2020, MLv=3.0 max) at Strasbourg and Vendenheim, to allow a third-party scientific expertise. During this period, the well was deepened of 450m to reach 5000m. New tests were authorized starting 10/2020, but were stopped on 28/10/2020 after a new period of seismicity with quake reaching 3.6MLv (04/12/2020). Authority decided on 07/12/2020 to definitely stop the project. Another earthquake of 3.9 ML (https://www.franceseisme.fr/donnees/intensites/2021/210626_0300/Rapport_BCSF-RENASS_2021R1_EVT210626-DPT67.pdf) occured on 26/06/2021. Authorities set up a committee of experts that delivered a first report (https://www.bas-rhin.gouv.fr/Politiques-publiques/Environnement/Geothermie/Rapport-du-comite-d-experts-cree-en-appui-a-l-administration-sur-la-boucle-geothermique-GEOVEN).