PHIVOLCS-DOST: Mayon Volcano update as of 19 March, 2018 - PH Trending

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Monday, 19 March 2018

PHIVOLCS-DOST: Mayon Volcano update as of 19 March, 2018

PHIVOLCS: MAYON VOLCANO BULLETIN 19 March 2018 8:00 A.M.

SUMMARY | Alert Level 3 currently prevails over Mayon Volcano.

Mayon’s activity in the past 24 hours was characterized by general quiescence, degassing from the summit crater and gravity-driven lava flow. Weak emissions of white steam-laden plumes drifting southwest occurred throughout the day. Lava flows could be observed at night to be moving downslope on the Miisi, Bonga and Basud Gullies  within  3.3 kilometers, 4.5 kilometers and 1.9 kilometers of the crater,  respectively. A total of seventy (70) rockfall events were recorded by Mayon's seismic monitoring network. Sulfur dioxide (SO2) emission was measured at an average of 1895 tonnes/day on 18 March 2018. A slight inflation of the lower flanks beginning 11 March 2018 was recorded by electronic tilt, consistent with results of Precise Leveling (PL) surveys on 03 - 06 March 2018. Overall ground deformation data indicate that the edifice is still swollen or inflated relative to pre-eruption baselines.



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