Kanlaon Volcano in the Philippines marked December 9 with significant eruptions in two separate years, 2017 and 2024, a rare and fascinating coincidence that caught the attention of experts and locals alike.
On December 9, 2017, a phreatic eruption occurred at 9:47 AM. Witnesses from Barangay Manghanoy, La Castellana, Negros Occidental, observed ash and steam ejecting from the summit, signaling increased volcanic activity. Fast forward to December 9, 2024, at 3:03 PM, Kanlaon erupted explosively, sending an ash plume approximately 3,000 meters into the atmosphere and triggering immediate evacuation measures.
The Philippine Institute of Volcanology and Seismology (PHIVOLCS) reported that thermal and X-ray cameras recorded pyroclastic density currents descending the volcano’s slopes during the 2024 eruption. These hazardous flows of hot ash, gas, and debris moved rapidly, emphasizing the need for urgent evacuations within a six-kilometer radius. The civil defense office confirmed that 87,000 residents from nearby areas were being evacuated to safer zones.
The two eruptions, though seven years apart, shared the same calendar date, sparking discussions about what some informally term “Anniversary Eruptions.” While not a scientific classification, such occurrences draw attention to the patterns and intervals of volcanic activity.
Kanlaon, one of the most active volcanoes in the Philippines, is located on Negros Island in the central Visayas region. It has a history of eruptions, though most are relatively mild compared to other Philippine volcanoes like Mayon or Taal. However, the 2024 event has raised concerns due to the intensity of its pyroclastic flows and the significant ash column it produced.
PHIVOLCS has placed Kanlaon on heightened alert, warning that further explosive activity could follow. Communities are advised to stay clear of the permanent danger zone and heed local authorities’ evacuation orders.
As Kanlaon continues to rumble, this rare coincidence serves as a reminder of the unpredictability of volcanic activity and the importance of preparedness. Experts will closely monitor the volcano in the coming days to provide timely updates and ensure public safety.