Researchers have made the ground shake in southern Switzerland, triggering thousands of tiny earthquakes in a monitored setting, as they seek to discover seismicity insights that could reduce risks.

¡°It was a success!¡± said Domenico Giardini, one of the lead researchers on the project, as he inspected a crack in the rock wall lining a narrow tunnel far below the Swiss Alps.

Wearing a fluorescent orange jumpsuit and helmet, a?geology professor at the Federal Institute of Technology in Zurich?switched on his headlight to get a better look.