epaselect epa08856652 A river in the aftermath of the eruption of Mount Semeru in Lumajang, East Java, Indonesia, 02 December 2020. Semeru volcano erupted on 01 December, spewing hot ash 3,000 metres down its slopes, causing panic among villagers. Authorities are on high alert as several volcanoes showed increased activity. EPA/FULLY HANDOKO EPA-EFE/FULLY HANDOKO