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Philippines

NDRRMC Update Sitrep No. 27 re Monitoring Activities on the Alert Status of Mayon Volcano

Attachments

I. ALERT STATUS OF MAYON VOLCANO

A. Alert Level 3 is still in effect as of 8:00 AM, 13 October 2014, which means that magma is at the crater and that hazardous eruption is possible within weeks. Mayon Volcano's seismic network recorded two (2) volcanic earthquakes during the past 24-hour observation period.

B. Moderate to voluminous emission of white steam plumes drifting Northeast was observed. No crater glow was observed last night. Sulfur dioxide (SO2) flux was measured at an average of 420 tonnes/day on 12 October 2014. Ground deformation data showed continuous inflation at the base of the edifice from August 2014 to October 2014 precise leveling surveys. The edifice remains inflated compared to baseline measurements. Tilt data also indicate continuous inflation at the base of the edifice since August 2014. All the above data indicate that the volcano is still in a state of unrest due to the movement of potentially eruptible magma.