Sixty-nine volcanic earthquakes were recorded in Taal Volcano in the past 24 hours, according to the Philippine Institute of Volcanology and Seismology (Phivolcs).
In its 8 a.m. volcano bulletin, the Phivolcs said the 69 tremors have durations of one to 61 minutes.
“Despite these, only weak steam-laden plumes were emitted by fumarolic activity at the vents of the main crater,” it said.
According to the state seismologists, temperature highs of 74.6 degrees Celsius and pH of 1.59 were last measured from the main crater lake on Feb. 18 and Feb. 12.
“Ground deformation parameters from continuous electronic tilt on Volcano Island record a slight deflation around the main crater since October 2020 but overall, very slow and steady inflation of the Taal region has been recorded by continuous GPS data after the eruption,” read the latest bulletin.
Phivolcs said the Taal Volcano remains under Alert Level 1.
It warned that sudden stream-driven or phreatic explosions, volcanic earthquakes, minor ashfall, and lethal accumulations or expulsions of volcanic gas can occur and threaten areas within the Taal Volcano Island.
Phivolcs cautioned the public against entering into the Taal Volcano Island, Taal’s permanent danger zone (PDZ), especially in the vicinities of the main crater and the Daang Kastila fissure.
The local government units (LGUs) were advised to continuously assess previously evacuated barangays around Taal Lake for damages and road accessibilities to strengthen preparedness, contingency, and communication measures in case of renewed unrest.
Phivolcs also advised civil aviation authorities 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.