PHIVOLCS Update for Mayon Volcano, 07 February 2018. - PH Trending

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Wednesday 7 February 2018

PHIVOLCS Update for Mayon Volcano, 07 February 2018.

PUBLIC ADVISORY: Notice of raising Mayon Volcano’s status from Alert Level 3 to Alert Level 4 as of January 22, 2018.

PHIVOLCS: MAYON VOLCANO BULLETIN 07 February 2018 8:00 A.M.

PHIVOLCS has raised the alert level to Alert Level 4  in effect over Mayon Volcano. The public is strongly advised to be vigilant and desist from entering the eight (8) kilometer-radius danger zone, and to be additionally vigilant against pyroclastic density currents, lahars and sediment-laden stream flows along channels draining the edifice.

SUMMARY | 

ayon’s activity in the past 24 hours was characterized by near continuous lava fountaining, lava flow and degassing from the summit crater. Seventy eight successive lava fountaining episodes, 152 in total since 5:57 AM of 5 February, have been recorded by the seismic network. Discrete episodes lasted three to 41 minutes and were accompanied by rumbling sounds audible within 10 kilometers of the summit crater. Persistent steam-laden plumes rose up to 2.5 kilometers from the summit before drifting east and northeast. Throughout the night, lava flows and consequent incandescent rockfalls were observed in the Miisi and Bonga-Buyuan channels.  Effused volumes of incandescent lava flows have advanced to 3.3 and 4.5 kilometers down the Miisi and Bonga-Buyuan channels, respectively, from the summit crater. Pyroclastic density currents or PDCs have deposited to the 4.6, 4.4 and 4.2 kilometer reaches of the Miisi, Bonga and Basud Gullies, respectively.


A total of eighty-three (83) volcanic earthquakes, most of which corresponded to lava fountaining events were recorded by Mayon's seismic monitoring network. Sulfur dioxide gas emission was measured at an average of 1,885 tonnes/day on 06 February 201


La Niña will still bring much rainfall during the  first quarter of 2018.
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