The Philippine Institute of Volcanology and Seismology (Phivolcs) recorded at least 27 volcanic earthquakes from Mayon Volcano over a 24-period, according to its Saturday morning bulletin on the volcano.
“Mayon Volcano’s monitoring network recorded 27 volcanic earthquakes during the 24-hour observation period. Moderate emission of white steam-laden plumes that crept downslope before drifting to the northeast was observed,” the bulletin said.
The 27 earthquakes were the most in the last four days. While there was no volcanic quake recorded on Thursday, Phivolcs recorded at least 10 tremors from the volcano on Wednesday, and two on Tuesday.
Also, Phivolcs documented a faint crater glow from Mayon on Wednesday, a photo of which was posted over social media that caused some alarm online, and those residing near the volcano were also alarmed.
“Faint crater glow at the summit of Mayon Volcano. Mayon has been at Alert Level 1 since July 17, 2020 and recorded 10 low-frequency volcanic earthquakes yesterday (Wednesday), January 20, 2021,” the post of Phivolcs stated.
Philvolcs is still maintaining Alert Level 1 in the Mayon Volcano area, and this means “that it is at an abnormal condition.”
“Although this means that presently no magmatic eruption is imminent, it is strongly advised that the public refrain from entering the six-kilometer radius Permanent Danger Zone (PDZ) due to the perennial life-threatening dangers of rockfalls, landslides/avalanches at the middle to upper slope, sudden ash puffs and steam-driven or phreatic eruptions from the summit,” Phivolcs said.
The most recent eruption of Mayon Volcano was in January 2018, causing Phivolcs to raise Alert Level 4. SOVEREIGNPH