News Mount Semeru Eruption in Indonesia: Pyroclastic Flows and Injuries Reported by Daniel Perez - News Editor June 20, 2026 by Daniel Perez - News Editor June 20, 2026 Mount Semeru, Indonesia’s most active volcano, erupted on Thursday, sending a column of ash and hot clouds 4.5 kilometers into the sky. Local disaster mitigation officials confirmed that the eruption … 0 FacebookTwitterPinterestEmail