The Phivolcs on Sunday said it has monitored a short-lived lava ejection that lasted for 35 seconds in Mayon Volcano.
In its latest update, the state seismologist said the 35-second lava ejection was accompanied by seismic and infrasound signals that occurred at about 04:42 AM on August 6.
Phivolcs also reported that Mayon continues to exhibit restiveness as it detected 92 low-frequency volcanic earthquakes (LFVQs) within a 2 to 9 minutes interval.
The country's active volcano also had 152 rockfall events and 1 pyroclastic density current (PDC).
In addition, it emitted 2,379 tonnes of volcanic sulfur dioxide (SO2) per day.
According to the state seismologist, the slow lava coming from the summit crater persists and these have maintained their respective lengths.
Lava along the southeastern Bonga gully remained at 3.4 kilometers (km) while 2.8 km along south Mi-si, and km meters along eastern Basud gully.
"GPS monitoring indicate a deflation of the eastern lower flanks in early July 2023 and inflation of the northwest middle flanks in the third week of July 2023," Phivolcs said.
"Longer-term ground deformation parameters from EDM, precise leveling, continuous GPS, and electronic tilt monitoring indicate that Mayon is still generally inflated relative to baseline levels," it added.
Phivolcs maintained Alert Level 3 over Mayon Volcano due to its relatively high level of unrest and that hazardous eruption within weeks or even days are still be likely.
Mayon has been on Alert Level 3 since June 8.
The state seismologist still recommends that Albay residents living within the Mayon Volcano’s six-kilometers radius Permanent Danger Zone (PDZ) remain taking refuge in evacuation centers for their safety.
Phivolcs continuously reminds Albayanos to be watchful against potential threats including pyroclastic density currents, lahars, and sediment-laden stream flows along channels draining the edifice.
“Civil aviation authorities must also advise pilots to avoid flying close to the volcano’s summit as ash from any sudden eruption can be hazardous to aircraft,” it added.
