Scientists have documented what they believe to be the world's second-tallest tsunami on record, which struck Tracy Arm fjord in southeast Alaska in August 2024. The tsunami reached a height of 481 meters (1,578 feet), making it taller than the Eiffel Tower.

The massive wave was triggered by a rockslide that occurred near the toe of a glacier in the fjord. Researchers recorded and analyzed the event as part of ongoing studies of coastal geological hazards in the region.

Tracy Arm fjord is a popular destination for cruise ships visiting Alaska's Inside Passage. The fjord's dramatic scenery, including glaciers and steep rocky walls, attracts thousands of tourists annually during the summer cruise season.

Researchers suggest that glacier retreat may be contributing to increased instability in coastal rock formations. As glaciers recede, they can leave steep rock faces unsupported, potentially increasing the likelihood of rockslides and subsequent tsunamis.

The findings highlight ongoing geological risks in Alaska's fjord systems, particularly in areas frequented by maritime traffic. Scientists continue to study the relationship between changing ice conditions and coastal stability in the region.