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).

The objective 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 several kilometers depth. It provides a comprehensive information base (thickness/depth maps, temperature maps, and geological cross-sections that can be generated across the entire area). The BRGM distributes the French part of this 3D geological model via its Cupidon repository (https://data.geoscience.fr/metadataRecord/4a58a7e3-8b71-4c69-9447-cb1c791d23a3). We cut out this model around the Soultz-sous-Forêts site with a radius of approximately 10 km. Modeled lithological interfaces: 010_blg : Base of the Plio-Quaternary 040_bff : Base of the Froidefontaine Formation 050_bt :Base of the Tertiary 070_thr : Top of the Great Oolite 090_bju : Base of the Lias 100_bku : Base of the Keuper 110_tms : Top of the Saliferous Muschelkalk 120_bmu : Base of the Muschelkalk 130_btr : Base of the Triassic 170_kr :Top of the Hercynian 600_salt_diapirs : Salt diapirs faults_fr_s03: fault

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: 48.66166457° Longitude: 7.77362583° 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.

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

Geoven (http://www.geoven.fr) was a geothermal power plant project initially managed by Fonroche Géothermie, later taken over by Arverne (https://arverne.earth/wp-content/uploads/2023/02/Communique_Presse_Georhin_130223.pdf). Located at the Ecoparc Rhénan site in Vendenheim, north of Strasbourg, the project aimed to generate 6 MW of electrical energy and 40 MW of thermal energy. It relied on two deep wells to extract hot water and reinject it at depths exceeding 4,000 meters. The two wells VDH-GT1 and 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). The Episode contains several datasets which you can find further down the page in "Links".

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: 48.66169796° Longitude: 7.77349337° 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 is a geothermal project initially managed by Fonroche Géothermie, then taken over by Arverne (https://arverne.earth/wp-content/uploads/2023/02/Communique_Presse_Georhin_130223.pdf). This project targets a deep reservoir (around 5km) close to a regional fault. Two wells were drilled, GT1 and GT2. From April to November 2019, several stimulation operations were carried out on the 2 wells GT1 and GT2. A first interruption took place after an initial period of seismicity (11/2019 - 01/2020, MLv=3.0 max) in Strasbourg and Vendenheim. Some of the data have been extrapolated from the Figures presented in the expert report, publicly available here: https://www.bas-rhin.gouv.fr/contenu/telechargement/47764/305601/file/Rapport%20du%20Comit%C3%A9_version%20int%C3%A9grale.pdf The Episode contains several datasets which you can find further down the page in "Links".

During the interruption, at the end of 2019, the GT2 well was deepened. The tests were authorized in September 2020, and new tests were carried out. These tests were stopped on 28/10/2020 after a new period of seismicity with an event of magnitude 2.8 Mlv on October 28, and 3.6 Mlv on December 4, 2020. Some of the data have been extrapolated from the Figures presented in the expert report, publicly available here: https://www.bas-rhin.gouv.fr/contenu/telechargement/47764/305601/file/Rapport%20du%20Comit%C3%A9_version%20int%C3%A9grale.pdf The Episode contains several datasets which you can find further down the page in "Links".