A massive landslide occurred in Tracy Arm Fjord in southeastern Alaska on August 10, 2025, triggering a massive local tsunami. Scientists estimate the wave reached a height of about 1,578 feet (about 481 meters), making it the second-largest tsunami ever recorded.
The landslide occurred in the early morning hours, causing no casualties or damage. About 64 million cubic meters of rock collapsed in a minute, creating a massive wave of water in the narrow fjord.
Researchers say the event is linked to climate change: retreating glaciers have weakened the mountain range. About a week before the event, small seismic fluctuations were recorded, which were later assessed as possible warning signs.
