BULLETIN MAYON VOLCANO 17 August 2014 8:00 A.M. Mayon Volcano’s (13.2500°N, 123.6833°E) seismic network recorded three (3) rock fall events during the past 24-hour observation period. Moderate emission of white steam plumes that drifted southeast was observed. Crater glow could not be observed due to thick rain clouds that covered the summit despite the emergence of a lava dome at the crater. Sulfur dioxide (SO2) flux was measured at an average of 850 tonnes/day on 11 August 2014, and at levels beyond the baseline level of 500 tonnes/day for the past two months. Ground deformation data showed inflationary changes in the edifice from February 2014 based on precise leveling surveys in the 2nd week of June 2014, and edifice inflation from January 2012 baselines based on continuous tilt measurement. All the above data indicate that the volcano may have been experiencing increased volcanic gas emission and slight but persistent swelling due to the intrusion of magma beneath. Mayon Volcano’s alert status has been raised to Alert Level 2, which means that magma has most likely intruded at depth and that current conditions could eventually lead to a larger eruption. The public is strongly advised to be vigilant and to desist from entering the six (6) kilometer-radius Permanent Danger Zone (PDZ) to minimize risks from sudden explosions, rockfall and landslides. PHIVOLCS maintains close monitoring of Mayon Volcano and any new development will be communicated to all concerned stakeholders.
Posted on: Sat, 16 Aug 2014 23:14:40 +0000
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