What is a tsunami? - NOAA's National Ocean Service
Tsunamis are giant waves caused by earthquakes or volcanic eruptions under the sea. They speed along as fast as jet planes. As they near land, these waves rear up to great heights and …
Tsunami - Wikipedia
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 …
What Is a Tsunami? Definition and Explanation - Science Notes …
2023年8月23日 · A tsunami is a set of waves and not a single wave. It may feature multiple waves that arrive over a period of hours. The first wave is not always the highest one.
Tsunami | Definition, Meaning, & Facts | Britannica
6 天之前 · A tsunami is a catastrophic ocean wave, usually caused by a submarine earthquake, an underwater or coastal landslide, or a volcanic eruption. Waves radiate outward from the …
Tsunamis - National Oceanic and Atmospheric Administration
2018年10月1日 · Tsunamis are just long waves — really long waves. But what is a wave? Sound waves, radio waves, even “the wave” in a stadium all have something in common with the …
What are tsunamis? | U.S. Geological Survey - USGS.gov
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 …
Tsunami Facts and Information - National Geographic
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. These walls of water can cause widespread...
U.S. Tsunami Warning Centers
2013年3月27日 · A tsunami is a seismic sea wave if it is generated by an earthquake (“seismic” means relating to an earthquake), but tsunamis can also be generated by nonseismic …
Tsunami: What is it, Causes, Formation, Types - Geology Science
2023年12月8日 · Tsunamis, also known as seismic sea waves, are massive ocean waves that are typically caused by underwater earthquakes, volcanic eruptions, or landslides. These waves …
What Is a Tsunami? | NASA Space Place – NASA Science for Kids
2024年11月8日 · Tsunami is a Japanese word that means "harbor wave." It is a large wave caused by movements in Earth's outer layer, or crust, which move ocean water. For example, …