Mayon Volcano Remains at Alert Level 1 Despite New Lava Spines

The Philippine Institute of Volcanology and Seismology (Phivolcs) affirmed on Monday, December 15, that Mayon Volcano continues to be under Alert Level 1, indicating low-level activity, despite the recent appearance of dark lava spines at its summit. Monitoring data showed no significant increase in seismic activity, gas emissions, or surface disturbances.

Phivolcs Director Dr. Teresito Bacolcol stated that close observation of the volcano has been ongoing since the release of close-up images on December 10, which revealed new lava spines or solidified magma at the peak. "After we presented the Dec. 10 close-up photos showing the new dark lava spines at Mayon's summit, we have maintained continuous monitoring of summit activity," Bacolcol remarked.

Data gathered over a 24-hour period ending at midnight on December 15 highlights stable conditions. "No volcanic earthquakes were recorded during this time frame, though six rockfall events and a faint crater glow visible only through a telescope were noted," he added.

According to the agency, all measured parameters remain within the thresholds consistent with Alert Level 1. Bacolcol emphasized that seismic activity has stayed low, even after the emergence of lava spines, noting, "For the past 24 hours, we did not register any volcanic earthquakes."

In addition, gas emissions around the volcano have remained subdued. "Our gas emission activity is also low," Bacolcol confirmed.

When questioned about the likelihood of an eruption in the near future, the director reassured that current data do not indicate an imminent eruption. "We remain at Alert Level 1, so an eruption in the next few days is not expected; however, we continue to closely monitor Mayon’s activity," he said.

Phivolcs emphasized that any increase in alert level would depend on clear and sustained signs of volcanic unrest. "We will raise the alert only if we observe a persistent escalation in activity, such as more frequent and larger rockfall events, a sudden spike in volcanic earthquakes, significant increases in sulfur dioxide emissions, or a brighter, more sustained crater glow," Bacolcol explained.

For now, the public is advised to remain vigilant but assured that Mayon Volcano's status remains stable under constant watch by the monitoring agency.