The figure shows the spatial distribution of the microseismicity that occurred in 10 temporally staggered intervals and spatially isolated stimulation zones and led to permanent microcracks in the granite rock.
The stimulations were carried out by Geo-Energie Suisse AG In the Bedretto Laboratory of ETH Zurich in November and December 2020.

The video shows the temporal evolution of the microseismicity that occurred in 10 temporally staggered intervals and spatially isolated stimulation zones and led to permanent microcracks in the granite rock.
The stimulations were carried out by Geo-Energie Suisse AG In the Bedretto Laboratory of ETH Zurich in November and December 2020.

The video shows the spatial distribution of the microseismicity that occurred in 10 temporally staggered intervals and spatially isolated stimulation zones and led to permanent microcracks in the granite rock.
The stimulations were carried out by Geo-Energie Suisse AG In the Bedretto Laboratory of ETH Zurich in November and December 2020.

The figure shows a procedure developed by ETH Zurich for predicting seismicity during hydraulic stimulations. The method was successfully used In the Bedretto Laboratory of ETH Zurich in November and December 2020 as part of the demonstration project for the multi-stage stimulation concept of Geo-Energie Suisse AG.

The video shows the opening of borehole ST1 at a depth of 265 (of 400) metres. The permeability of the water-conductive fractures (transmissivity) increases visibly: Despite three activated pumps, the borehole cellar is flooded.

Natural fissure in the compact granite of the Gotthard massif in the Bedretto Laboratory of ETH Zurich. Visible in the wall of the access tunnel of the underground laboratory.

Installation of a seismometer chain in borehole ST1 to monitor the stimulations in borehole ST2, at the Bedretto Laboratory of ETH Zurich. The work was carried out under the direction of Geo-Energie Suisse.

Installation of a seismometer chain in borehole ST1 to monitor the stimulations in borehole ST2, at the Bedretto Laboratory of ETH Zurich. The work was carried out under the direction of Geo-Energie Suisse.

Installation of packers to isolate the stimulation intervals in borehole ST2 at the Bedretto Laboratory of ETH Zurich. The work was carried out under the direction of Geo-Energie Suisse.

Installation of packers to isolate the stimulation intervals in borehole ST2 at the Bedretto Laboratory of ETH Zurich. The work was carried out under the direction of Geo-Energie Suisse.

Assembly of innovative measurement equipment for monitoring and control of induced microseismicity.

Analysis of seismic measurement data in the Bedretto Laboratory of ETH Zurich.

Analysis of seismic measurement data in the Bedretto Laboratory of ETH Zurich.