A significant landslide in the Tracy Arm fjord of Alaska led to the formation of a tsunami that propelled water and debris 1,580 feet upward on a mountain slope. Researchers have pinpointed multiple ...

A tsunami is a series of powerful ocean waves caused by a sudden movement of water. Most tsunamis begin with large underwater earthquakes. When sections of the seafloor suddenly lift or drop, they ...

Tsunami Formation A tsunami is a series of waves caused by a significant and sudden movement of water in the ocean.

On Jan. 15, 2022, the Hunga Tonga-Hunga Ha’apai volcano in Tonga erupted, sending a tsunami racing across the Pacific Ocean in all directions. As word of the eruption spread, government agencies on ...