A tsunami (/ (t) suːˈnɑːmi, (t) sʊˈ -/ (t)soo-NAH-mee, (t)suu-; [1][2][3][4] from Japanese: 津波, lit. 'harbour wave', [5] pronounced [tsɯnami]) is a series of waves in a water body caused by the displacement of …

Dec 5, 2024 · 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.

Feb 3, 2026 · 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 for …

Tsunami waves are unlike typical ocean waves generated by wind and storms, and most tsunamis do not "break" like the curling, wind-generated waves popular with surfers. Tsunamis typically consist of …

Jul 30, 2025 · A tsunami is a series of ocean waves that sends surges of water, sometimes reaching heights of over 100 feet (30.5 meters), onto land.

A tsunami is one the most powerful and destructive natural forces. It is a series of waves (not just one) caused by a large and sudden displacement of the ocean. Tsunamis radiate outward in all directions …

Having plans and policies to reduce tsunami impacts helps build resilience and protect communities most at risk. NASA’s expertise and access to Earth-observing data are a valuable tool to help …

Dec 8, 2023 · Tsunamis, also known as seismic sea waves, are massive ocean waves that are typically caused by underwater earthquakes, volcanic eruptions, or landslides. These waves can travel at high …

May 22, 2025 · Potentially imperceptible in deep water, a tsunami increases in height as it encounters the shallow waters of shore, often leading to extensive wreckage and loss.