Mount Semeru in Indonesia erupted on November 5, 2025, sending an ash plume soaring to 4,600 meters (15,000 feet) above sea level. The eruption was observed at 09:20 UTC, with the ash cloud drifting northeast at approximately 18 km/h. The Darwin Volcanic Ash Advisory Centre (VAAC) raised the Aviation Color Code to Orange, signaling ongoing intermittent eruptions that could pose a risk to aviation.