However, early Sunday morning, November 4, Mount Kelud spewed ash 500 metres into the air, indicating a full eruption was taking place. The eruption isn't over, Saut Simatupang, head of Indonesian Volcanology and Geological Hazard Mitigation Agency, said. Seismologists monitoring the crater said surface temperatures in Mount Kelud's crater lake rose on November 4 to from on November 3. At a depth of , the temperature jumped to 66.1 degrees Celsius on November 4 from 45.9 degrees Celsius on November 3. The extreme heat created a cloud of steam and smoke high.