Anna Reusch, a doctoral student at ETH Zurich's Geological Institute, was making a routine research vessel run on Lake Neuchâtel when she noticed an unusual shape on the control panel screen.
At a depth of over 100 mettrs, she found something no one had ever detected before: a crater measuring 10 meters deep and 160 meters in diameter.
Reusch investigates the sediment in the lakes on the western Swiss Plateau for traces of past earthquakes, which involves taking high-resolution measurements of the floor of Lake Neuchâtel to find evidence of tectonically active zones that could trigger major earthquakes. The period Reusch is looking at is geologically speaking very recent: sometime in the past 12,000 years.