MAYON VOLCANO BULLETIN 03 May 2015 8:00 A.M. PDF Print

Mayon Volcano’s seismic monitoring network recorded two (2) volcanic earthquakes during the past 24 hours. Moderate emission of white steam plumes that crept downslope towards west-southwest was observed. The summit was visible but no crater glow was observed last night. Precise leveling surveys on March 17 to 26, 2015 indicated slight inflation of the edifice relative to February 17 to March 5, 2015 surveys, consistent with short-term inflation recorded by continuous GPS. The above ground deformation data suggest that the edifice is still swelling at a very slow rate possibly due to slight movements of previously stalled magma.

Mayon Volcano’s alert status is currently at Alert Level 2. This means the volcano is at a moderate level of magmatic unrest. Although the volcano is currently exhibiting low-level of seismic activity, ground deformation data indicates that eruptible magma had already accumulated the previous year beneath the edifice. Current conditions may still change and eventually lead to hazardous eruption. The public is still reminded to avoid entry into the 6-km Permanent Danger Zone or PDZ due to perennial hazards of rockfalls, avalanche, ash puffs and sudden steam-driven or phreatic eruptions at the summit area. Furthermore, people living in valleys and active river channels are cautioned to remain vigilant against sediment-laden streamflows and lahars in the event of prolonged and heavy rainfall. PHIVOLCS-DOST is closely monitoring Mayon Volcano’s activity and any new development will be immediately posted to all concerned.