The Search for What Shook the Earth for Nine Days Straight

On September 16, 2023, the world began to rumble. A gargantuan rock-ice avalanche tumbled into the deep waters of a fjord in eastern Greenland, unleashing a megatsunami whose initial waves reached a height of 200 meters. The waves scoured the walls of the fjord before flowing into the open sea. Even for this avalanche-prone corner of Greenland, the collapse and subsequent megatsunami were shocking…

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