PHIVOLCS: 270 quakes recorded at Taal Volcano in past 24 hours

Robie de Guzman   •   March 26, 2021   •   630

MANILA, Philippines — A total of 270 quakes, including 193 episodes of volcanic tremor having durations of up to 12 minutes, were recorded in Taal Volcano in the past 24 hours, the Philippine Institute of Volcanology and Seismology (PHIVOLCS) said Friday.

In its latest bulletin, PHIVOLCS said it also monitored 77 low-frequency volcanic earthquakes, which is higher than the 25 recorded on the previous day.

The agency said it also observed weak emission of steam-laden plumes from fumarolic vents that rose up to 10 meters. Sulfur dioxide emission that averaged 925 tons per day was measured on Thursday.

“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,” PHIVOLCS said.

“These parameters may indicate increased magmatic activity at shallow depths beneath the edifice,” it added.

Despite increased seismic activities, PHIVOLCS said that Taal Volcano remains under alert level 2 which means “increased unrest.”

The agency noted that the unrest has been “elevating” and that it is under constant evaluation.

PHIVOLCS reminds the public that under 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 Taal Volcano Island.”

Entry into the island and its permanent danger zone, especially in the vicinities of the main crater and the Daang Kastila fissure, must be strictly prohibited, the agency stressed.

Civil aviation authorities are also advised to inform 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.

383 volcanic earthquakes recorded in Taal Volcano in past 24 hours

Aileen Cerrudo   •   April 14, 2021

MANILA, Philippines— The Philippine Institute of Volcanology and Seismology (Phivolcs) on Wednesday maintained Alert level 2 over Taal Volcano as it recorded 383 volcanic earthquakes in the past 24 hours.

Based on the latest bulletin, upwelling of hot volcanic fluids in the main crater lake occurred Tuesday morning (April 13) and 383 volcanic earthquakes, including 238 episodes of volcanic tremor lasting from one to 12 minutes occurred in the past 24 hours.

Phivolcs also said it continues to observe “a very slow and steady inflation and expansion of the Taal region that began after the January 2020 eruption.”

The agency reminds local government units around the area to be vigilant and continuously assess the situation. Civil aviation authorities must advise pilots to avoid flying close to the volcano.

“DOST-PHIVOLCS is closely monitoring Taal Volcano’s activity and any new significant development will be immediately communicated to all stakeholders,” the bulletin said. AAC

Phivolcs maintains Alert Level 2 in Taal as possibility of magmatic eruption increases

Aileen Cerrudo   •   March 24, 2021

MANILA, Philippines — The Philippine Institute of Volcanology and Seismology (Phivolcs) on Wednesday (March 24) warned about an increasing possibility of a magmatic eruption in Taal Volcano following an elevated increase in seismic activity.

In an advisory, Phivolcs said that since the Taal Volcano unrest in February, the overall volcanic activity has increased. The agency has recorded 259 volcanic earthquakes in Taal Volcano in the past 24 hours.

In the previous week, sulfur oxide gas emission also reached a high peak compared to the previous month. 

There has also been an indication of magma migrating across shallow depths of the Taal Volcano island which increased the possibilities of a magmatic eruption, according to Phivolcs.

“Alert Level 2 (increased unrest) is currently maintained over Taal Volcano but that unrest has been elevating and is under constant evaluation,” according to Phivolcs.

The agency maintains an Alert Level 2 in Taal. It also reminds local government units to continuously assess and strengthen their preparation. Entry is prohibited on the Taal Volcano Island, Taal’s permanent danger zone, especially the vicinity of the main crater and the Daang Kastila fissure. -AAC

PHIVOLCS: 164 volcanic quakes around Taal recorded in last 24 hours

Robie de Guzman   •   March 18, 2021

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
08:00 A.M.

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.

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