An increased number of volcanic earthquakes was recorded in Mayon Volcano, the state volcanology bureau reported on Tuesday, June 27.
In its 8:00 a.m. bulletin, the Philippine Institute of Volcanology and Seismology (Phivolcs) said about 107 volcanic earthquakes were recorded in the volcano in the past 24 hours, including 241 rockfall events and 17 dome-collapse pyroclastic density currents.
Phivolcs also noted that “very slow” effusion of lava from the summit crater of Mayon Volcano continued to feed lava flows and collapse debris on the Mi-isi (south) and Bonga (southeastern) gullies.
As of Tuesday, Alert Level 3 is maintained over Mayon Volcano due to its “relatively high level of unrest.”
Phivolcs on Monday, June 26, released a notice of increased seismic activity and ground deformation in Mayon Volcano.
“An increasing number of weak and shallow volcanic earthquakes began on 24 June 2023 and steadily increased to 102 volcanic earthquakes during a 24-hour between 25 and 26 June 2023,” Phivolcs said, noting the additional 100 volcanic earthquakes logged between 5:00 a.m. and 3:00 p.m. Monday.
“The increased seismicity was accompanied by a noticeable sharp jump in ground tilt on the southwest sector of the edifice that began on 25 June 2023,” the advisory read.
“As of present, steady-rate lava effusion from the summit crater and sporadic generation of rockfall and pyroclastic density currents or PDCs still persist,” it further read.
Phivolcs said communities within the 7- and 8-kilometer radius permanent danger zone (PDZ) must always be prepared, while the 6 kilometer-radius PDZ must remain evacuated. Justin Ilano –cf
