A powerful earthquake and a rare volcanic eruption shook Russia's Kamchatka Peninsula and the Kuril Islands, prompting tsunami warnings and raising concerns among emergency officials and seismologists.

The Kuril Islands stretch from the southern tip of Kamchatka Peninsula. Russian scientists had warned on Wednesday that strong aftershocks were possible in the region in the next several weeks.

This follows a 6.5 magnitude quake on Thursday and a powerful 8.8 magnitude earthquake on July 30 in the same region, which caused a tsunami that flooded Severo-Kurilsk's port. The Krasheninnikov volcano also erupted for the first time in 450 years.