|Area||Country||Max Height (m)|
|Gulf of Trieste||Italy||1.5|
|Daytona Beach||United States of America||3.5|
A meteotsunami or meteorological tsunami is a tsunami-like wave phenomenon of meteorological (atmosphere and air pressure related) origin. Meteotsunamis propagate in the water in the same way as other waves, including tsunamis, and have the same coastal dynamics, but unlike tsunamis, they are not caused by geological events in the earth's crust ("plate tectonics") nor by impact events such as landslide and meteor strikes. Instead they are essentially a kind of storm surge - a raising of sea level or large amplitude seiche oscillation in the sea, caused by intense low pressure or certain wind conditions associated with tropical storms and hurricanes, in the troposphere. These kinds of waves are called meteotsunamis because, for an observer on the coast where it strikes, the two types would look the same. The difference is in their source only.
These tsunami-like ocean waves are principally caused by traveling air pressure disturbances, including those associated with atmospheric gravity waves, roll clouds, pressure jumps, frontal passages, and squalls, which normally generate barotropic ocean waves in the open ocean and amplify them near the coast through specific resonance mechanisms. In contrast to "ordinary" impulse-type tsunami sources, a travelling atmospheric disturbance normally interacts with the ocean over a limited period of time (from several minutes to several hours).
Tropical cyclone storm surges
Speed of a meteotsunami
In the Western Atlantic, a meteotsunami’s deep water speed can reach 732 km/h (455 mph). This value is equivalent to the long-wave speed of a barotropic wave at a depth of 4200 m.
- Historic tsunami
- Tsunami warning system (TWS)
- Deep-ocean Assessment and Reporting of Tsunamis (DART)
- Rip current
- Significant wave height
- Undular bore
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- Tsunami Glossary 2008, UNESCO
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"It was like an atomic bomb going off. Right after the eye passed, whole houses came by us at 30 miles an hour."
- Eyewitness video of Supertyphoon Haiyan's meteotsunamic storm surge on November 6, 2013
- Alfonso-Sosa, Edwin (2014). "Calculating the Speed of a Transatlantic Meteotsunami on June 13 2013" (PDF): 1–9. Retrieved 2014-05-26.