#megatsunami #Alaska #ClimateCrisis

"Massive Alaska megatsunami was second largest ever recorded

A massive 'megatsunami' wave created when part of an Alaskan mountain crumbled into the sea is the second tallest ever recorded – and a reminder of the risks posed by melting glaciers, say scientists.
Last summer a giant wave swept through a remote fjord in southeast Alaska leaving destruction in its wake.

The event went largely unreported at the time, but a new scientific analysis shows it was caused by a massive landslide.
An incredible 64 million cubic metres of rock – the equivalent of 24 Great Pyramids - splashed into the water below. The sheer power of that amount of rock plunging into the fjord in under a minute created a gigantic wave almost 500 metres tall.
Only the time it happened – in the early hours of the morning – prevented tourist cruise ships being caught up in the devastation, say the researchers."

https://archive.ph/O8D0Y#selection-885.0-903.151

The terminus of College Glacier in the Alaska Range, and the braided meltwater stream of College Creek draining into Phelan Creek and eventually the Delta River. The debris on the glacier surface is supraglacial moraine, rock that's been carried on top of the ice as the glacier moves.

https://www.lwpetersen.com/alaska-guide/college-glacier-hiking-guide/

#alaska #hiking #glacier #glaciology #alaskarange