Mount Sinabung on Indonesia's Sumatra island erupted on Monday, sending a column of black ash and smoke approximately 3,500 meters (11,482 feet) into the atmosphere. The eruption occurred without immediate reports of casualties, evacuations, or disruptions to flights.
Residents, visitors, and tourists have been advised to avoid activities within 6 kilometers (3.7 miles) of the summit and in nearby villages in the Karo district of North Sumatra province. Roads, vehicles, and buildings in several affected villages were covered in gray ash, prompting local authorities to distribute masks to residents.
Officials elevated the volcano alert level to "Watch," the second-highest tier, which also expanded the safety zone around the 2,600-meter (8,530-foot) mountain. Lana Saria, head of Indonesia’s Geological Agency, stated that this eruption is considered initial and that a larger eruption is possible.
Increased activity at Mount Sinabung, including dozens of earthquakes, had been recorded since mid-August. In recent years, approximately 30,000 people have been displaced from their homes due to volcanic activity in the region.
Indonesia, an archipelago nation of over 280 million people, experiences frequent seismic activity. Sinabung is among the country's more than 120 active volcanoes, situated on the Pacific "Ring of Fire," a geologically active zone characterized by volcanoes and fault lines.