Scientists have identified the “mystery volcano” that erupted in 1831 and cooled Earth’s climate. They have linked it to an island volcano in the northwest Pacific Ocean.

Authorities say over 51,000 residents remain at risk due to the increased seismic activity over the past two months. The Ethiopian Disaster Risk Management Commission said on January 4, that 13,000 people from the Afar and Oromia regions have already been moved.