Powerful earthquakes in Russia: Tsunami alert issued; three quakes including 7.4 magnitude strike off near Kamchatka

A series of powerful earthquakes rattled Russia's Far East coast on Sunday, prompting a tsunami alert. The United States Geological Survey reported the strongest quake at a magnitude of 7.4, striking near Petropavlovsk-Kamchatsky. This triggered a warning of potential hazardous tsunami waves within a 300-kilometer radius.