|MAYON VOLCANO BULLETIN, 20 August 2011, 8:00 A.M.|
|Saturday, 20 August 2011 08:47|
Mayon Volcano’s (13.2500°N, 123.6833°E) seismic network detected one (1) volcanic earthquake during the past 24 hours. Moderate emission of white steam that drifted towards west-northwest was observed during cloud breaks yesterday. Crater glow observed during the night was at Intensity I (only seen by the telescope). Sulfur dioxide (SO2) emission rate on 08 August 2011 measured an average of 290 tonnes per day. Ground deformation survey (precise leveling) last 31 May to 04 June 2011 indicated a slight inflation of the edifice as compared with 06-10 March 2011.
Mayon Volcano’s alert status remains at Alert Level 1. Although this means that no eruption is imminent, it is strongly advised that the public refrain from entering the 6-kilometer radius Permanent Danger Zone (PDZ) due to the threat of sudden steam-driven eruptions and rockfalls from the upper and middle slopes of the volcano. Active stream/river channels and those identified as perenially lahar prone areas on all sectors of the volcano should also be avoided especially during bad weather conditions or when there is heavy and prolonged rainfall. DOST-PHIVOLCS is closely monitoring Mayon Volcano’s activity and any new development will be relayed to all concerned.