MAYON VOLCANO BULLETIN 16 September 2014 8:00 A.M. via PHIVOLCS-DOST Mayon Volcano’s (13.2500°N, 123.6833°E) seismic network recorded thirty-two (32) volcanic earthquakes and seventy-two (72) rock fall events during the past 24-hour observation period. Intensity III (bright) crater glow was visible last night, although rain clouds prevented visual observation of the crater during the day. Rolling incandescent rockfall within the uppermost reaches of the Bonga Gully last night indicates that the summit lava dome is breaching the crater in its southeastern side. Sulfur dioxide (SO2) flux was measured at an average of 611 tonnes/day on 02 September 2014. Ground deformation data showed inflationary changes in the edifice from February 2014 based on precise leveling surveys on the 3rd week of August 2014, and edifice inflation from January 2012 baselines based on continuous tilt measurement. All the above data indicate that the volcano is exhibiting relatively high unrest due to the movement of potentially eruptible magma. Mayon Volcano’s alert status has been raised toAlert Level 3. This means that magma is at the crater and that hazardous eruption is possible within weeks. It is recommended that the 6-km radius Permanent Danger Zone (PDZ) around the volcano and the 7-km Extended Danger Zone (EDZ) on the southeastern flank be enforced due to the danger of rock falls, landslides and sudden explosions or dome collapse that may generate hazardous volcanic flows. PHIVOLCS maintains close monitoring of Mayon Volcano and any new development will be communicated to all concerned stakeholders.
Posted on: Mon, 15 Sep 2014 23:23:10 +0000