The megatsunami , which occurred on September 16, 2023, was first reported through social media posts and a report of waves hitting a military installation on Ella Island. False-color Landsat 8 image of Lituya Bay, 2020. The damaged trimline is still imprinted in the forest. The lighter green areas along the shore indicate places where forests are younger than older trees (darker areas) that were not affected by the tsunami. The 1958 Lituya Bay earthquake occurred on July 9, 1958, at 22:15:58 PST with a moment magnitude of 7.8 to 8.3 and a maximum Mercalli intensity of XI (Extreme). [4] The strike-slip earthquake took place on the Fairweather Fault and ... In this explainer, we look at what a mega tsunami is, what the study has found, and which areas are most at risk. Here’s a look: What is a mega - tsunami ? Mega - tsunamis are not like regular tsunamis, which usually produce waves only a few feet high. These waves can reach hundreds of feet in height. In September 2023, a massive landslide in Greenland's Dickson Fjord triggered a mega-tsunami , sending seismic waves globally for nine days. The 650-foot wave, caused by climate change-induced ...
