Tsunamis form when a sudden event, like an undersea earthquake, displaces a large volume of water. Their size can vary greatly depending on factors.

A tsunami is a series of ocean waves that sends surges of water, sometimes reaching heights of over 100 feet (30.5 meters), ...

Tsunamis pose a danger to every community across Canada’s three coastlines. A tsunami is a series of large, persistent waves caused by the sudden displacement of a body of water. Earthquakes are ...

Tsunamis are most often caused by large earthquakes, but there can be other sources. The sea floor is disrupted which displaces the ocean water. Waves then start to race outward, at several ...

What causes a tsunami? Tsunamis form when sudden events — such as undersea earthquakes or volcanic eruptions — displace a large volume of water, according to the Weather Channel.

Weather Ask the Meteorologist: How do tsunamis form? Following the major 8.8M earthquake in Russia, tsunami alerts were issued for Hawaii, Alaska and the Continental U.S. West Coast Wednesday.

A magnitude 8.2 earthquake caused a tsunami that killed more than 5,200 people on Dec. 30, 1703, according to NOAA data. The event occurred off the southwest Boso Peninsula, which is just south of ...