Dec 5, 2024 · Your official U.S. government weather forecasts, warnings, meteorological products for forecasting the weather, tsunami hazards, and information about seismology.

Unlike normal ocean waves, which are generated by wind, or tides, which are in turn generated by the gravitational pull of the Moon and the Sun, a tsunami is generated by the displacement of …

Feb 16, 2025 · What is a tsunami? A tsunami is a catastrophic ocean wave, usually caused by a submarine eruption. Waves radiate outward from the generating impulse at speeds of up to …

Dec 5, 2024 · Earthquakes can trigger tsunamis when they displace the seafloor, causing waves that can rush toward shore. A tsunami warning indicates that significant inundation and coastal …

These destructive surges of water are caused by underwater earthquakes. A tsunami is a series of ocean waves that sends surges of water, sometimes reaching heights of over 100 feet (30.5 …

Tsunami inundation maps show the coastal areas that may be flooded by tsunami waves. Based on tsunami inundation models, these maps are used to create evacuation maps and guide …

Apr 2, 2007 · National Geographic News looks at how the killer waves are caused, what the warning signs are, and how to respond when a tsunami threatens. A tsunami is a series of …

For current tsunami information, visit U.S. Tsunami Warning System. Current research improves measurement technology, increases the speed and accuracy of operational forecast models, …

Read these pages to learn about tsunamis and what you can do to keep yourself and your loved ones safe in the event of a tsunami.

What is a tsunami? A tsunami is a series of waves caused by earthquakes or undersea volcanic eruptions. On September 29, 2009, a tsunami caused substantial damage and loss of life in …