The Philippine Institute of Volcanology and Seismology (Phivolcs) said Mayon Volcano continues to release lava, producing rockfall events and pyroclastic density currents (PDCs)

In a televised interview on Tuesday, chief of Phivolcs Volcano Monitoring and Eruption Prediction Division Ma. Antonia Bornas said Phivolcs recorded 63 PDCs and 206 rockfall events on 12 January. 

Short lava flows were also observed in gullies near the crater. Bornas said efforts to measure sulfur dioxide emissions were hampered by poor weather conditions which limited the visibility. 

A brief lava fountain was observed Tuesday morning described as a single burst indicating pockets of volcanic gas erupting. 

Short lava flows were also observed in gullies near the crater. Bornas said efforts to measure sulfur dioxide emissions were hampered by poor weather conditions, which limited visibility.

She added that a brief lava fountain was observed Tuesday morning, described as a single burst. According to Bornas, this indicates pockets of volcanic gas erupting at the surface of the crater.

As of 8 a.m., Tuesday, Phivolcs recorded 1,270 rockfall events, 429 PDCs, and nine volcanic earthquakes. 

Bornas added Phivolcs does not currently see indications that a highly explosive eruption of Mayon similar to eruptions that occurred in 2000 and 2001, adding that such eruption would likely be preceded by multiple warning signs, including an increase in volcanic earthquakes. 

Meanwhile, the Civil Aviation Authority of the Philippines extended the Notice to Airmen (NOTAM) for flights near Mayon Volcano due to its continued activity.

CAAP said the NOTAM will be in effect from 10:06 a.m. on 13 January until 8:03 a.m. on 14 January. Flight operators were advised to avoid flying close to volcanic summits.