A so-called "doomsday tsunami" is likely to hit the United States in the near future, but scientists now say there is a possibility that it could happen sooner than previously thought.

Each week, tsunami survivors gather at temporary housing centers in the city of Yamada along Japan's northeast coast. They sing songs to cheer themselves up and comb through salvaged photos. One ...

A tsunami warning has been issued Wednesday for parts of Southcentral and Southwest Alaska due to a large earthquake along the Aleutian Chain.

<p>Tsunami water rushes into the Fukushima Daiichi nuclear power plant, as seen from the fourth floor of the radioactive waste disposal building, March 11, 2011.

Japan Tsunami Pictures: Nuclear Reactor and Cities Burn The day after Japan's biggest earthquake, cities smoldered, soldiers lent helping hands, and a nuclear reactor exploded.

A rare roll cloud was seen passing over several beaches in Portugal on Sunday, June 29. The phenomenon features a cloud that strongly resembles a tsunami quickly rolling over a space where two contrasting temperatures merge.