A powerful series of undersea quakes, including a 7.4 magnitude tremor, struck off Russia’s Kamchatka Peninsula on Sunday, ...

The Pacific Tsunami Warning Center has issued a warning for Russia's Kamchatka Peninsula after two quakes — the larger with a magnitude of 7.4 — struck in the sea nearby on Sunday.

A tsunami warning is issued when a tsunami has the "potential to generate widespread inundation" and is either occurring or imminent. A massive volcanic eruption has occurred on Tonga Island of ...