Mayon update, 18 December 2009: activity intensifies 18 December 2009Posted by admin in activity reports, eruptions, Mayon, Philippines.
Tags: Mayon, Philippines, volcanic activity reports, volcanic eruptions
Over the previous 24 hours the bulletin reports an increase in Mayon’s activity, with 248 earthquakes and tremors recorded by the seismic network, 50 of which ‘were of the explosion type’. Harmonic tremors were continually recorded. Explosions produced ash plumes to 1000 metres above the summit, and the plume drifted south-west. Continuous steaming produced ‘dirty white to light brown’ plumes, and an intensified crater glow was visible at night. Lava has reached approximately 3 km downslope from the crater, while incandescent blocks have descended to between 3 and 4 km downslope. Sulphur dioxide emission was high at 1,065 tonnes/day. The alert level remains at 3, and Phivolcs warns that ‘Since an increasing trend is noticeable at present, the possibility of hazardous volcanic eruption is high’.
Figures for the ongoing evacuation are somewhat confused, but the Press Association reports today that more than 35,000 people have been evacuated from around Mayon, with around 10,000 more still to go. ABS-CBN News reports that ‘The Provincial Disaster Coordinating Council is expecting to evacuate all 9,946 families from the danger zones on Friday’. There is still reluctance to evacuate in some areas, and people have been re-entering the danger zone, despite the best efforts of the authorities. Farmers have been going back to tend their crops and animals.
This, from the Philippine Daily Inquirer, is a bit bizarre:
Asked about the relationship of the coming full moon with the impending explosive eruption, Baloloy [Alex Baloloy of Phivolcs] said that in the history of Mayon, it really does not follow a real pattern but several explosive eruptions have happened during or before the full moon.
For all our Mayon coverage: Mayon « The Volcanism Blog.
Mayon activities intensify – Manila Bulletin, 18 December 2009
Scientists mull raising Mayon alert to level 4 – Philippine Daily Inquirer, 18 December 2009
‘Hazardous’ Mayon Volcano eruption likely: Phivolcs – ABS-CBN News, 18 December 2009
Major eruption of Philippine volcano imminent – Bloomberg, 18 December 2009
Farmers return to erupting Philippine volcano: govt – AFP, 18 December 2009
Residents moved from volcano threat – Press Association, 18 December 2009
Global Volcanism Program: Mayon – summary information for Mayon (0703-03=)
Philippine Institute of Volcanology and Seismology – website for Phivolcs, when it’s working