Mount Semeru

Indonesia: At least 13 dead, over 50 injured as Java's Mount Semeru erupts

Indonesia sits on the Pacific Ring of Fire, where the meeting of continental plates causes high volcanic and seismic activity

Indonesian authorities evacuate thousands after multiple volcanoes see increased activity

Hot ash tumbled as far as 9,800 feet down the slopes of Mount Semeru early Tuesday, triggering panic among villagers, said Raditya Jati, the National Disaster Mitigation Agency spokesman