Tsunamis are actually a series of waves, but are catagorized by the magnitude of the largest wave of the set. There are two types of tsunamis: Local and Teletsunamis. Local tsunamis are waves ...

A 6.9 magnitude earthquake in the Hyuga-nada Sea, at a depth of 18.6 miles, triggered a tsunami alert in Japan. The Japan Meteorological Agency reported the quake and the alert. The tsunami is ...

See below for a map of tsunami risk by county, and a list of the U.S. counties at greatest risk from such a disaster.

A magnitude-6.9 earthquake struck Japan’s Kyushu region late Monday night, prompting brief tsunami advisories for coastal areas in Miyazaki and Kochi prefectures. The waves, initially projected ...