MAYON VOLCANO ADVISORY

10 July 2026

10:30 PM

 

 

This is a notice of increased volcanic SO₂ emission from Mayon Volcano.

 

Eruptive unrest at Mayon Volcano, now in its 186th consecutive day, has recently exhibited a decrease in rockfall and pyroclastic density current or PDC (uson) activity, indicating a decline in the effusion of lava from the summit crater. However, volcanic SO₂ degassing measured by campaign spectrometry methods in the past two days have significantly increased. Volcanic SO₂ flux yesterday averaged 4,569 tonnes/day and increased today, 10 July 2026, to 7,475 tonnes/day, the highest emission from Mayon recorded in the last 16 years. To compare, SO₂ flux from the start of the eruption on 6 January 2026 until present averages 2,300 tonnes/day. Rising volcanic SO₂ emissions likely forewarn of further eruptive activity at the summit crater and continued generation of volcanic hazards, the impacts of which can be worsened by the prevailing poor weather conditions over the volcano.

 

DOST-PHIVOLCS would like to remind the public that Mayon Volcano is at Alert Level 3 as eruptive unrest and continued lava effusion persists based on current monitoring parameters. This could generate volcanic hazards including lava flows and collapse-fed rockfall and PDCs or uson on the southern and eastern slopes as well as ashfall that could be dispersed extensively by strong winds. The public should refrain from entering the 6-kilometer radius Permanent Danger Zone (PDZ) due to the danger posed by these and other volcanic hazards. Increased vigilance and pre-emptive response actions to guard against lahars and sediment-laden streamflow along channels draining the edifice are also advised as prolonged heavy rains over Albay Province could occur with the passage of Typhoon “Inday” east of Luzon. Civil aviation authorities should continue to advise pilots to avoid flying close to the volcano’s summit as ash from any sudden eruption can be hazardous to aircraft.

 

DOST-PHIVOLCS maintains close monitoring of Mayon Volcano and any new development will be communicated to all concerned stakeholders.

 

DOST-PHIVOLCS