Major areas of current research include determining why some large earthquakes do not generate tsunamis while other smaller ones do. This ongoing research is designed to help accurately …

Dec 8, 2025 · tsunami, catastrophic ocean wave, usually caused by a submarine earthquake, an underwater or coastal landslide, or a volcanic eruption. The term tidal wave is frequently used …

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

Feb 25, 2025 · A tsunami is a series of extremely long waves caused by a large and sudden displacement of the ocean, usually the result of an earthquake below or near the ocean floor.

Tsunamis A tsunami is a wave generated in a body of water by a disturbance that moves the whole water column, from seafloor to ocean surface. Any physical force that displaces a …

Dec 8, 2025 · A powerful earthquake struck off northern Japan late Monday local time, triggering a tsunami of up to 28 inches in Pacific coast communities, the Japanese Meteorological Agency …

Oct 3, 2018 · These awe-inspiring waves are typically caused by large, undersea earthquakes at tectonic plate boundaries. When the ocean floor at a plate boundary rises or falls suddenly, it …

4 days ago · The quake struck the country's north just days after a 7.5-magnitude earthquake in the same region injured 50 people.

Dec 8, 2025 · A powerful magnitude earthquake has hit off the northeastern coast of Japan, with officials warning tsunami waves could hit the country. Watch and follow live.

Dec 8, 2025 · The 7.6-magnitude quake struck in waters off Aomori Prefecture on Japan’s main island, Honshu. It triggered a tsunami warning, which was later lifted.