Geo-Energie Jura SA (GEJ) has successfully completed the exploration phase of the Haute-Sorne (Canton Jura, Switzerland) geothermal pilot project. Tests conducted in July in the deep borehole confirm that rock permeability can be increased sufficiently to create a usable geothermal reservoir—while complying with the prescribed seismic thresholds. Geothermal energy is available around the clock, produces no CO₂ emissions, and is an ideal complement to other renewable energy sources.

The reassessment of seismic risk based on the current results is more favourable than the estimates that underpinned the 2015 project approval. The first two reports on the tests carried out in the deep borehole were submitted to the authorities of the Canton of Jura yesterday; additional reports will follow in the coming months. These documents will be reviewed from a safety perspective by independent experts appointed by the canton. On the basis of their professional assessments, the cantonal authorities will then decide on the continuation of the project.