A powerful 7.4 earthquake has struck off the coast of Russia, with the tremor felt in Alaska, Japan, and Hawaii, prompting tsunami warnings to be issued in the region

A powerful magnitude 7.4 earthquake has struck off the coast of Russia, the US Geographical Survey has reported, and has been followed by a tsunami warning

Five powerful quakes, including one with a magnitude of 7.4, struck in the sea off Russia's Kamchatka Peninsula.