The Mount Agung volcano in Bali, Indonesia, began erupting on November 21, less than a month since its alert status was downgraded following a decrease in seismic activity.

BNPD, the Indonesian disaster management agency, retweeted one of their researchers, who said that the eruption reached a height of 700 meters and warned people to stay at least six kilometers from the mountain. Credit: Instagram/Aly Webster via Storyful