 It would have travelled at about , giving those on the shoreline little time to flee.The team also found evidence of four older layers of turbidite, suggesting that such collapses have been a recurrent event since Lake Geneva formed at the end of the last Ice Age some 19,000 years ago.It is not yet known how frequently they have occurred – further investigation will be required to answer this question – but researcher Guy Simpson says, "It's certainly happened before and I think that we can expect that it will probably happen again sometime."