When millions of tonnes of rock fell one kilometre into an Alaskan fiord last year, it set off one of the largest tsunamis ...
When the slope of a mountain above Tracy Arm fjord, in Alaska, gave way on 10 August 2025, 64 million cubic metres of rock ...
Measuring 1,578ft (481 metres) high, the tsunami ran up the wall of Tracy Arm fjord on 10 August, 2025.