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Phivolcs sees 'anomalously high' levels of sulfur dioxide from Taal Volcano

Philstar.com
Phivolcs sees 'anomalously high' levels of sulfur dioxide from Taal Volcano
This aerial photograph taken on June 24, 2021 shows the Taal volcano crater.
AFP / Ted Aljibe

MANILA, Philippines — State seismologists said they have detected the highest levels of volcanic sulfur dioxide from the Taal Volcano on Sunday, warning that a similar eruption on July 1 could happen "anytime soon."

In an advisory, Phivolcs said it recorded 22,628 tonnes of SO2 gas emission from the Taal. Since 12 a.m. of July 4, it also saw 26 strong and very shallow low-frequency tremors in the volcano island. 

"Some of these earthquakes were reportedly accompanied by rumbling and weakly felt by fish cage caretakers off the northeastern shortlines of the Volcano Island," the agency said.

"These observation parameters may indicate that an eruption similar to the July 1, 2021 event may occur anytime soon," it added.

 

 

Thousands have been forced to evacuate their homes in recent days following the unrest over Taal Volcano.

Phivolcs sought to remind that Alert Level 3 remains up in the area, and current sulfur dioxide parameters indicate "ongoing magmatic extrusion at the Main Crater that may further drive succeeding explosions."

The agency said it strongly recommends evacuating communities in the volcanic island, as well as high-risk barangays of Bilibinwang, Banyaga, Agoncillo, Boso-Boso, Gulod, the eastern part of Bugaan East, Laurel and Batangas province.

It recommended the move citing possible hazards of "pyroclastic density currents" and volcanic tsunami should stronger eruptions subsequently occur. 

Per the Pacific Northwest Seismic Network, pyroclastic density currents mean "hot, fast moving "clouds" of gas, ash, and rock debris known as tephra."

"Pyroclastic density currents are most hazardous on, and immediately surrounding, the volcanic edifice," it said. "The best way to keep safe from is keep distant from the mountain during periods of unrest, when authorities are concered about possible eruption."

State seismologists added that the entire Taal Volcano Island has been declared a Permanent Danger Zone, and entry to it along with high-risk areas Agoncillo and Laurel must be disallowed. 

"All activities on Taal Lake should not be allowed at this time," it said. "Communities around Taal Lake shores are advised to remain vigilant, take precautionary measures against possible airborne ash and vog, and calmly prepare for possible evacuation should unrest intensify."

Phivolcs has urged local governments there to do health checks on communities affected by vog to assess the impact of the sulfur dioxide on their constituents.

BATANGAS

PHIVOLCS

SULFUR DIOXIDE

TAAL VOLCANO

As It Happens
LATEST UPDATE: October 12, 2023 - 6:26pm

Get updates as Phivolcs issues warnings over activity in Taal Volcano. (Main photo by Philstar.com/Rosette Adel)

October 12, 2023 - 6:26pm

The Philippine Institute of Volcanology and Seismology issues a notice reporting an increased and continuous degassing activity from Taal Volcano.

In its 6 p.m. advisory, Phivolcs says the sulfur dioxide emission from the main crater reached 9762 tonnes per day. This was the higher recorded this year.

Phivolcs adds that there was no smog or vog observed. — Rosette Adel

October 11, 2023 - 5:21pm

The Philippine Institute of Volcanology and Seismology says Taal Volcano is still under Alert Level 1.

In an update on Wednesday, its says that the daily sulfur dioxide emissions (SO2) reached 2887 tonnes / day (06 October 2023).

Phivolcs also observes upwelling of hot volcanic fluids in the Main Crater Lake. — Rosette Adel

October 9, 2023 - 4:12pm

The Philippine Institute of Volcanology and Seismology reports that Taal Volcano's daily sulfur dioxide emissions (SO2) reached 2887 tonnes.

It observes upwelling of hot volcanic fluids in the Main Crater Lake as well as volcanic smog or vog.

The volcano's emissions are also 2400 meters tall. — Rosette Adel

October 8, 2023 - 4:04pm

The Philippine Institute of Volcanology and Seismology releases time-lapse snapshots of degassing activity from the Taal Main Crater and volcanic smog or vog formation on Sunday.

These were taken from 5:45 a.m. to 11:42 a.m. by the Mt. Macolot, Cuenca, Batangas station (VTCU) IP Camera.

— Rosette Adel

September 26, 2023 - 12:28pm

The Philippine Institute of Volcanology and Seismology records daily sulfur dioxide emissions that reached 2730 tonnes / day (22 September 2023).

It also observes upwelling of hot volcanic fluids in the Main Crater Lake and observed VOG.

Phivolcs adds that there is a ong-term deflation of the Taal Caldera; short-term inflation of the northern flanks of the Taal Volcano Island.

 

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