The aim of the GeORG project (Geopotentials of the deep Upper Rhine Graben, https://www.geopotenziale.org/home/index_html) was to create a 3D model of the geological structure of the Upper Rhine Graben down to a depth of several kilometers. The project began in October 2008 and ended in December 2012. GeORG offers a complete geoscientific information base. Maps showing the deep structure and spatial distribution of geological layers and temperatures have been extracted. Geological cross-sections can be generated over the entire study area and in all directions. These show the stratigraphic position and stacking of layers in space. GeORG has created an information access platform for companies, public and private project developers and research organizations. The results are accessible to all at https://maps.geopotenziale.eu. Several products from the GeORG mapviewer around Vendenheim geothermal site are extracted.

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).

Catalogue of microseismicity with magnitude recorded as part of Fiori’s thesis, around Vendenheim site. Work on this catalog was published in the article : Fiori, R., Vergne, J., Schmittbuhl, J., Zigone, D. (2023). Monitoring induced microseismicity in an urban context using very small seismic arrays: The case study of the Vendenheim EGS project. GEOPHYSICS : Volume 88, Issue 5 (https://doi.org/10.1190/geo2022-0620.1) Earthquakes detected by this network are compared to the regionally distributed network used by the Bureau Central Sismologique Français-Réseau national de surveillance sismique (BCSF-Renass), the national academic agency in charge of monitoring seismicity in France. Stations information are available : DENSGEOVEN 1: the appromimate dates of the deployement : December 10,2020 to April 6, 2021 DENSGEOVEN 2: the approximate dates of the deployement : July 16,2021 to August 18, 2021 Time period : 01/12/2020 to 29/09/2021 The data parameters are the following: Column 1: Date (UTC) Column 2: Time (UTC) Column 3: Latitude (°) Column 4: Longitude (°) Column 5: Depth (m) Column 6: Magnitude Column 7: Coherence Column 8: Catalogue

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

Catalogue of microseismicity with magnitude recorded during the Geoven project at Vendenheim, calculated by the BCSF-Rénass (https://renass.unistra.fr/). The geographic extent of the catalogue is a square with sides of about 12 km approximately centered on the middle between the extremity of the two wells VDH-GT1 (https://cdgp.u-strasbg.fr/geonetwork/srv/fre/catalog.search#/metadata/VDH-GT1) and VDH-GT2 (https://cdgp.u-strasbg.fr/geonetwork/srv/fre/catalog.search#/metadata/VDH-GT2). Time period: 17/12/2016 - today. The data parameters are the following: Column 1: Seismic ID Column 2: Date and time (UTC) Column 3: Latitude Column 4: Longitude Column 5: Magnitude Column 6: Type of magnitude Column 7: Depth (km) Column 8: Type of depth Column 9: Catalogue Column 10: Evaluation mode Column 11: Number of stations used Column 12: Number of phases Column 13: Azimutal gap Column 14: Significant city Column 15: Distance of the city (km) Column 16: Type of event Remarks: The catalogue is automatically computed at request time. Not all the events of the requested catalogue are induced by geothermal activities. The induced events are referred as "induced or triggered event" in the column 16 of the catalogue.

Surface seismic network used to study the Geoven Episode. The network consists of stations from several networks: Resif (https://www.resif.fr/) (FDSN code: FR), the French seismic network composed of high gain seismometers and accelerometers, French Accelerometric Network (FDSN code: RA), LRGB network (FDSN code: LE), the German network for Baden-Wuerttemberg, RaspberryShake network (FDSN code: AM) financed by the BCSF-Renass and the LabEx G-eau-thermie Profonde. Public stations from Fonroche network (ECK4 and VDH4) are included in the FR network. Data are automatically computed at request time

VDH-GT2 is the second well drilled within the framework of the geothermal project Geoven at Vendenheim. The well was drilled from August 2018 to February 2019 to 5308 m (4417m TVD), and prolongated between November 2019 and February 2020 to 6312m (5011m TVD). VDH-GT2 will be used as injection well. Location of the VDH-GT2 wellhead (in WGS84): Latitude: 48.8970198 Longitude: 7.9386127 Altitude: 134m At the present time, the Geoven project (https://cdgp.u-strasbg.fr/geonetwork/srv/fre/catalog.search#/metadata/VDHD) is still in development and this description may change.

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).

VDH-GT1 is the first well drilled within the framework of the Geoven geothermal project at Vendenheim. The drilling of the well began in June 2017 and reached a final length of 5408 m in March 2018. A second leg at VDH-GT1 was drilled between February and September 2019 and a third between June and August 2020 to 5447 m (4644m TVD). VDH-GT1 will be used as production well. Location of the VDH-GT1 wellhead (in WGS84): Latitude: 48.8970080 Longitude: 7.9387218 Altitude: 134m At the present time, the Geoven project (https://cdgp.u-strasbg.fr/geonetwork/srv/fre/catalog.search#/metadata/VDHD) is still in development and this description may change.