Scientists have finally identified the cause of a mysterious seismic signal that shook Earth for nine consecutive days last year. It turns out that our planet was rocked by a mega tsunami trapped inside a fjord after a mountaintop collapse.
The gigantic wave, measuring 650 feet (200 meters) high, sloshed back and forth inside East Greenland's Dickson Fjord for nine days in September 2023, its movement sending seismic waves reverberating through the planet's crust.
