MANILA, Philippines — At least 164 volcanic quakes, including 67 tremors, have been recorded around Taal Volcano in the last 24 hours, the Philippine Institute of Volcanology and Seismology (PHIVOLCS) said Thursday.
In its latest bulletin, PHIVOLCS noted that the volcanic quakes have durations of one to two minutes and three hybrid events.
TAAL VOLCANO BULLETIN
18 March 2021
In the past 24-hour period, the Taal Volcano Network recorded one…
Posted by Philippine Institute of Volcanology and Seismology (PHIVOLCS-DOST) on Wednesday, March 17, 2021
The latest number of quakes recorded is higher than Wednesday’s 55 quakes with 44 tremors.
PHIVOLCS also observed that the activity at the main crater consisted of weak emission of steam-laden plumes from fumarolic vents that rose 20 meters high. The volcano also emitted Sulfur dioxide (SO2) that averaged 605 tons.
The agency also reported that on March 4, the temperature at the Taal main crater lake was at 71.8°C, while its acidity level was at pH of 1.59 last February 12.
“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,” it added.
PHIVOLCs said Taal Volcano remains under alert level 2, which means that sudden steam-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.
The agency reiterated that Taal’s Permanent Danger Zone (PDZ), especially the vicinities of the main crater and the Daang Kastila fissure, must remain strictly prohibited.
PHIVOLCS reminded local government units to continuously assess and strengthen the preparedness of previously evacuated barangays around Taal Lake in case of renewed unrest.
Civil aviation authorities must also 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.