(221204) -- LUMAJANG, Dec. 4, 2022 (Xinhua) -- Villagers prepare to evacuate after the eruption of Mount Semeru at Sapiturang village in Lumajang, East Java, Indonesia, Dec. 4, 2022. Semeru volcano on Indonesia's Java island erupted on Sunday, spewing a 1.5-km high ash column, authorities said. As of Sunday afternoon, the country's Volcano Disaster Mitigation of the Center for Volcanology and Geological Hazard Mitigation (PVMBG) has raised its volcanic alert level for Semeru volcano to level 4, the highest level of a four-tier volcanic alert system. (Photo by Bayu Novanta/Xinhua)