A Greenland megatsunami stunned scientists in September 2023 when a massive wave created a mysterious signal that traveled through Earth for nine days. The event was not caused by a typical earthquake, yet seismic stations across the planet recorded a slow, repeating pulse every 92 seconds. The strange rhythm forced researchers to investigate a hidden force deep inside a remote Arctic fjord.
The answer came from Dickson Fjord in East Greenland, where a huge rock and ice avalanche collapsed into the water. The impact generated a Greenland megatsunami estimated to reach nearly 650 feet high. Unlike ordinary ocean waves that quickly lose energy, this wave became trapped between towering fjord walls and continued moving like water inside a giant natural container.
