Semeru volcano in Indonesia erupted, spewing a cloud of ash 15km into the sky and forcing the evacuation of nearly 2,000 people, authorities reported.
Indonesia's Center for Volcanology and Geological Hazard Mitigation, PVMBG, raised the level of volcanic activity to its highest level and warned residents not to approach within five miles (8km) of the volcano.
With 142 volcanoes, Indonesia is home to 8.6 million people living within 10km (six miles) of one – the world's largest population living in close range of a volcano.