A massive 8.8 earthquake off Russia's coast produced unexpectedly small tsunamis. Learn why some of Earth's biggest quakes ...

A new study is challenging a long-held theory that tsunamis form and acquire their energy mostly from vertical movement of the seafloor.

Tsunami formation When a strong earthquake happens, its waves spread upward and outward. When that happens in the ocean, you get a tsunami. How tsunamis form ...

Not all large earthquakes trigger tsunamis. Tsunami formation depends on the location, magnitude, and depth of the quake, according to the National Oceanic and Atmospheric Administration (NOAA).

A tsunami is life-threatening. If you are near the coast or the mouth of a river, evacuate immediately.

Japan is highly susceptible to earthquakes and tsunamis. If you’ve ever been in Japan during a quake, you might have seen or heard messages like “There is no worry about a tsunami connected ...

Tsunami warnings in Japan have been switched to advisories. But people across the country are urged to stay cautious, as the tsunami advisories remain in place from Hokkaido to Okinawa.