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Philippines

NDRRMC Update Sitrep No. 06 re Monitoring Activities on the Alert Status of Mayon Volcano

Attachments

l. SITUATION OVERVIEW

ALERT STATUS OF MAYON VOLCANO

  • Alert Level 3 is still in effect as of 8:00 AM, 22 September 2014, which means that magma is at the crater and that hazardous eruption is possible within weeks. Mayon Volcano’s seismic network recorded three (3) volcanic earthquakes and thirteen (13) rockfall events during the past 24-hour observation period.

  • Weak to moderate emission of white steam plumes drifting northeast and north-northeast was observed. Crater glow was not observed last night. Sulfur dioxide (SOZ) flux was measured at an average of 1,290 tonnes/day on 19 September 2014, although 802 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 levelling 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.