What is a tsunami? Unable to view our graphics? Click here to see them. Tsunamis are a series of giant waves caused by undersea earthquakes at tectonic plate boundaries, or volcanic eruptions.

A massive 8.8 magnitude earthquake struck 80 miles off the east coast of Russia on Tuesday night, prompting a tsunami advisory for Southern California that will remain in place until Saturday. Tsun… ...

Tsunami waves hit Hawaii after 8.8 earthquake. We explain the natural disasters While South Florida is safe from earthquake and tsunami threats, many are wondering about how the phenomena work.

One of this century’s most powerful earthquakes struck off the coast of Russia and generated tsunami warnings and advisories for a broad section of the Pacific, including Alaska, Hawaii and the ...

When a magnitude 8.8 earthquake rocked Russia's Kamchatka Peninsula on Tuesday, officials warned that damaging tsunami waves could follow. Instead, the waves that reached Hawaii and the U.S. West ...

A magnitude 8.8 earthquake struck off Russia's Kamchatka Peninsula on July 29, triggering alerts, watches and warnings in some U.S. states.

Tsunami activity continued to build in northern California as high tide approached Wednesday morning with maximum confirmed heights along the coast of ...

A massive 8.8 earthquake off Russia's coast produced unexpectedly small tsunamis. Learn why some of Earth's biggest quakes don't always create devastating waves.