With a wave runup of nearly 200 metres, the tsunami that ripped through an Alaskan fjord in 2015 was one of the largest ever documented. But with no-one killed, it almost went unnoticed.

It was triggered by a massive rockfall caused by melting of the Tyndall Glacier, which experts say has given them the clearest picture to date of landslide-generated tsunamis.

With global warming causing glaciers to shrink at an unprecedented rate, there is an increased risk of tidal waves triggered by the collapse of rocky slopes weakened as ice retreats, a study in Scientific Reports said Thursday.

“As glaciers thin around the world, they are modifying their landscapes dramatically. In the case of Taan Fjord, the result was a massive tsunami,”…