Earthquakes produce multiple types of seismic waves. This forms the basis for early warning systems, like ShakeAlert.

A 7.8 magnitude undersea earthquake near Russia caused a tsunami scare. Here's why we fear the destructive waves

A strong earthquake along Russia's Kamchatka Peninsula caused the National Weather Service to issue a tsunami advisory for parts of Alaska on Thursday.

A powerful magnitude 7.8 aftershock off Russia’s Kamchatka Peninsula that arose from July’s magnitude 8.8 earthquake is raising concerns about possible tsunami impacts, although risk appears to be wan

A major, 7.8-magnitude earthquake struck in the North Pacific Ocean on Friday, according to the United States Geological Survey. The earthquake prompted a brief tsunami advisory, the second-highest alert level, for some coastal portions of western Alaska, which was lifted about two hours later.

A confirmed earthquake with a magnitude of 8.8 at 3:25 p.m. PST, 315 miles southwest of Bering Island, Komandorski, and 80 miles southeast of Petropavlovsk, Kamchatka, in Russia, has started a slew of small tsunamis throughout the Pacific Coast. So far, a ...

The National Tsunami Warning Center had issued an advisory for the western end of the Aleutian Islands, from Amchitka Pass to Attu.

The magnitude 7.8 earthquake struck off the eastern coast of Russia, prompting close monitoring in Alaska, Hawaii and the U.S. West Coast. But no tsunami waves were detected along the remote island chain and the tsunami advisory was canceled.

Alaska receives tsunami advisory following magnitude 7.8 earthquake off Russia's eastern coast, September 18. National Weather Service warns Western Aleutian Islands residents while California and Hawaii monitor potential tsunami threat with earliest Hawaii arrival projected 2:51 p.