A window into Earth’s interior

A window into Earth’s interior

Deep under the Swiss Alps, the BedrettoLab opens a rare window into the Earth. Its extraordinary overburden of up to 1.5 km of rock and high-tech sensor network capture the underground like no other place. This unique setup powers cutting-edge research on energy topics, earthquakes, and fundamental research.

2026-09-24

FEAR 3 experiment successfully concluded

Picture for FEAR 3 experiment successfully concluded

The FEAR 3 experiment was successfully concluded in the early hours of 23 September, following approximately 40 hours of controlled water injection and continuous 24/7 monitoring between 21 and 23 September. The tunnel is expected to return to normal operations by Monday, 28 September. 

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2026-09-16

Upcoming FEAR-3 experiment at the BedrettoLab

Picture of the FEAR-3 experiment in the Bedretto tunnel

The BedrettoLab is preparing the next phase of the Fault Activation and Earthquake Rupture (FEAR) project. Building on the results of the FEAR-2 experiment conducted in April 2026, researchers will carry out a new field experiment starting on September 21.

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Virtual tour: Click on play and get a deep insight into the BedrettoLab.

Public Tours at the BedrettoLab

In cooperation with the Museum Sasso San Gottardo, ETH Zurich offers public tours of the BedrettoLab.

To book a tour, submit your request via the following link: https://www.sasso-sangottardo.ch/gruppen-bedrettolab