650 Feet High: The Megatsunami That Rocked Greenland’s East Coast

[Grim Reaper 6]

Analysis of the seismic signals – shock waves that travel thousands of kilometers in the earth’s crust – showed that a so-called standing wave formed in the fjord after the landslide. Initially, the parts of the flank that fell into the water triggered a giant wave that spread through the entire fjord to the offshore island of Ella, more than 50 kilometers away. Near the point where the rockslide entered the fjord, the maximum height was more than 200 meters, along the coast an average of 60 meters. Parts of the wave apparently spilled back from the steep banks in the narrow fjord and a standing wave began to form, which undulated back and forth for more than a week. However, this wave measured only around 1 meter in height.

https://scitechdaily.com/650-feet-high-the-megatsunami-that-rocked-greenlands-east-coast