THREE
LAVA COLLAPSES RECORDED AT MAYON VOLCANO
By Amita Legaspi
State volcanologists recorded three
lava collapses at Mayon Volcano on Monday morning, January 15 that resulted in
rockfall and small-volume pyroclastic density currents.
A bulletin from Philippine Institute
of Volcanology and Seismology (Phivolcs) stated that the lava collapses
occurred at 9:41 a.m., lasting five minutes; 10:05 a.m., lasting seven minutes;
and 11:07 a.m., lasting eight minutes, based on seismic record.
It said the first two events appear
to have originated from the lava front and produced an ash cloud that drifted
to the southwest sector and rained ash on the barangays of Travesia, Muladbucad
Grande, Maninila, and Masarawag in the municipality of Guinobatan.
The third event produced a grayish
to dirty white ash column with a maximum height of approximately one kilometer
above the summit before drifting west-southwest.
Alert Level 3 remains in effect, meaning that the
volcano is currently in a relatively high level of unrest as magma is at the
crater and hazardous eruption is possible within weeks or even days.
State volcanologists strongly
advised the public to be vigilant and desist from entering the six kilometer-radius
Permanent Danger Zone (PDZ) and the seven-kilometer Extended Danger Zone (EDZ)
on Mayon's southern flanks due to the danger of rockfalls, landslides and
sudden explosions or dome collapse that may generate hazardous volcanic flows.
Increased vigilance against
pyroclastic density currents, lahars and sediment-laden streamflows along
channels draining the edifice is also advised. Pilots were advised to avoid
flying close to the volcano’s summit as ash from any sudden eruption can be
hazardous to aircraft.
The bulletin said based on the
seasonal wind pattern, ash fall events may most likely occur on the southwest
side of the volcano./MP
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