The Mount Agung volcano in Bali, Indonesia, erupted 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 four miles from the mountain. Credit: Savvy Insiders Guide Ubud via Storyful