The Philippine Institute of Volcanology and Seismology on Saturday logged 10 volcanic earthquakes, 128 rockfall events, and two pyroclastic density currents in Albay's Mayon Volcano network in the past 24 hours.

Phivolcs said Mayon's lava flows have advanced to approximately 3.4 kilometers in Bonga (southeastern), 2.8 kilometers in Mi-isi (south), and 1.1 kilometers in Basud (eastern) gullies.

The rockfall and PDCs generated by collapses of the lava flow margins, as well as of the summit dome, deposited debris still within four kilometers of the crater.

It emitted 2,175 tons of sulfur dioxide daily as the upwelling of hot volcanic fluids in the Main Crater lake was observed.

Alert Level 3 status remained over Mayon Volcano, indicating that it is currently in a relatively high level of unrest, and hazardous eruption within weeks or even days could still be possible.

Entering a 6-kilometer radius Permanent Danger Zone remains prohibited due to the danger of PDCs, lava flows, rockfalls, and other volcanic hazards.

Meanwhile, Phivolcs said the Taal Volcano in Batangas province also continued to show low-level unrest in the past 24 hours.

It observed the emission of volcanic smog, or vog, in the Mayon which was produced due to the upwelling of hot volcanic fluids in the main crater lake.

Phivolcs explained that vog consists of fine droplets containing volcanic gas such as SO2 which is acidic.

If exposed, people may experience irritation of the eyes, throat, and respiratory tract in varying degrees, depending on the gas concentrations and durations of exposure.

Phivolcs said those sensitive to the ill effects of vog are those with asthma, lung disease, and heart disease, as well as the elderly, pregnant women, and children.

Hence, residents were urged to limit their exposure to vog by avoiding outdoor activities, staying indoors, and shutting doors and windows.

In the past 24 hours, Taal also exhibited eight volcanic earthquakes including two tremors that lasted 2 to 3 minutes.