MAYON VOLCANO BULLETIN 20 September 2014 8:00 A.M. Mayon Volcano’s (13.2500°N, 123.6833°E) seismic network recorded four (4) volcanic earthquakes and twenty two (22) rockfall events during the past 24-hour observation period. Rain clouds covered the summit preventing visual observation. Sulfur dioxide (SO2) flux was measured at an average of 1,290 tonnes/day on 19 September 2014 although SO2 emission rates peaked at 2,360 tonnes/day on 06 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 to Alert 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. APSEMO MS- King M. Reginaldo
Posted on: Sat, 20 Sep 2014 00:01:54 +0000
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