 It is hypothesised that the impact of the Tauredunum landslide destabilised sedimentary deposits at the mouth of the Rhône, causing their collapse and triggering a large tsunami.According to computer simulations, a wave up to high would have been created by the collapse and would have travelled the full length of the lake within 70 minutes of the event.It would have struck Lausanne within only 15 minutes, where it would have been about high, though the damage there would have been limited as the city stands on a steeply sloping shoreline.