|MAYON VOLCANO BULLETIN 21 July 2011 8:00 A.M.|
|Thursday, 21 July 2011 13:14|
Mayon Volcano’s (13.2500°N, 123.6833°E) seismic network did not detect any volcanic earthquake during the past 24 hours. Wispy to moderate emission of white steam clouds drifting north-northeast and east-northeast was observed from the crater. Fair crater glow (Intensity II - seen by the naked eye) was observed last night. Results of ground deformation survey (precise leveling) conducted last 31 May 2011 to 04 June 2011 showed slight inflation of the volcano’s edifice as compared with 06-10 March survey.
Alert Level 1 remains in effect over Mayon Volcano. Although this means that no eruption is imminent, it is recommended that the public should not enter the 6-kilometer radius Permanent Danger Zone (PDZ) due to the continuing threat from sudden small explosions and rockfalls from the upper and middle slopes of the volcano. Active stream/river channels and those perennially identified as lahar prone areas in the southern sector 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.