In the past 24-hour period, the Taal Volcano Network recorded two hundred fifty-four (254) volcanic earthquakes, including two hundred twenty (220) episodes of volcanic tremor having durations of one (1) to twenty-seven (27) minutes, thirty-three (33) low frequency volcanic earthquakes, and one (1) volcano-tectonic earthquake.
Activity at the Main Crater consisted of weak emission of steam-laden plumes from fumarolic vents that rose five (5) meters. Sulfur dioxide (SO2) emission averaged 509 tonnes/day yesterday, 31 March 2021.
Temperature highs of 71.8°C and pH of 1.59 were last measured from the Main Crater Lake respectively on 04 March and 12 February 2021. Ground deformation parameters from electronic tilt, continuous GPS and InSAR data analysis indicated a very slow and steady inflation and expansion of the Taal region since after the January 2020 eruption. These parameters may indicate increased magmatic activity at shallow depths beneath the edifice.
Alert Level 2 (Increased Unrest) is currently maintained over Taal Volcano but that unrest has been elevating and is under constant evaluation. DOST-PHIVOLCS reminds the public that at Alert Level 2, sudden steam-driven or phreatic explosions, volcanic earthquakes, minor ashfall, and lethal accumulations or expulsions of volcanic gas can occur and threaten areas within and around TVI.
Taal Volcano Network records 220 episodes of volcanic tremor in past 24 hours
DOST-PHIVOLCS strongly recommends that entry must be strictly prohibited into Taal Volcano Island, Taal’s Permanent Danger Zone or PDZ, especially the vicinities of the Main Crater and the Daang Kastila fissure, and occupancy and boating on Taal Lake.
Local government units are advised to continuously assess and strengthen the preparedness of previously evacuated barangays around Taal Lake in case of renewed unrest.
Civil aviation authorities must advise pilots to avoid flying close to the volcano as airborne ash and ballistic fragments from sudden explosions and wind-remobilized ash may pose hazards to aircraft.
DOST-PHIVOLCS is closely monitoring Taal Volcano’s activity and any new significant development will be immediately communicated to all stakeholders
Meanwhile, Alert Level 1 (Abnormal) prevails over Pinatubo Volcano, which means that there is low-level unrest that may be related to tectonic processes beneath its edifice and that no imminent eruption is foreseen.
Entry into the Pinatubo Crater area must be conducted with extreme caution and should be avoided if possible.