Taal Volcano activity not likely to trigger The Big One —Phivolcs

Maris Federez   •   January 13, 2020   •   2713

MANILA, Philippines — The Philippine Institute of Volcanology and Seismology (Phivolcs) believes that Taal Volcano’s explosive eruption will not likely trigger the Big One to happen.

Phivolcs’ Volcano Monitoring and Eruption Prediction Division chief Maria Antonia Bornas said that just because Taal Volcano’s current activity causes earthquakes, and is very near Metro Manila, do not mean these should be a reason for concern as it may not cause movement in the West Valley Fault.

Bornas also said there are no studies that support the possibility that the volcanic eruption can affect the movement of tectonic plates, including fault lines, such as the West Valley Fault.

“Marami rin pong hindi naniniwala na pwedeng mangyari yun for the simple reason na ang fault po, yung tectonic earthquakes is shallow. Nasa crust po yan e. nasa crust po ng mundo. Samantalanag yung pinag mumulan po ng magma ay nasa mantle – mantle po nasa ilalim pa po ng crust,” Bornas said. —(with details from Vincent Arboleda) /mbmf

171 volcanic quakes recorded at Taal Volcano

UNTV News   •   July 13, 2021

Taal Volcano showed signs of continued unrest, recording 171 volcanic earthquakes in the past 24 hours.

The Philippine Institute of Volcanology and Seismology said alert level 3 remains in effect over the volcano.

The quakes included 13 low frequency volcanic earthquakes and 157 volcanic tremor events lasting from one to 97 minutes.

Phivolcs reported low-level background tremor which has been observed since July 7.

It added that Taal Volcano’s sulfur dioxide emission is still high, averaging 6,134 tonnes/day on Monday, while steam-rich plumes were being observed rising from the main crater to as high as 1,500 meters before drifting southwest.

185 volcanic quakes recorded at Taal Volcano — Phivolcs

Aileen Cerrudo   •   July 12, 2021

MANILA, Philippines—More volcanic earthquakes were recorded in Taal Volcano, according to the Philippine Institute of Volcanology and Seismology (Phivolcs).

Based on the latest bulletin, 185 volcanic earthquakes were recorded during the 24-hour period, including seven low frequency volcanic earthquakes, 176 volcanic tremor events having durations of one to 16 minutes. High levels of volcanic sulfur dioxide (SO2) gas emissions averaging to 6,421 tonnes per day were also recorded on July 11. Steam-rich plumes that rose 1,500 meters before drifting southwest and west-northwest were also generated from the Taal Main Crater.

Alert Level 3 is still maintained over Taal Volcano. The public is reminded that the entire Taal Volcano Island is a Permanent Danger Zone (PDZ), and entry into the island as well as into the high-risk barangays of Agoncillo and Laurel must be prohibited due to the hazards of pyroclastic density currents and volcanic tsunami should strong eruptions occur. Civil aviation authorities must advise pilots to avoid flying over Taal Volcano Island.

“All activities on Taal Lake should not be allowed at this time. Communities around the 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,” according to Phivolcs.

The agency also assured it continues to closely monitor the volcanic activities in Taal. AAC

Phivolcs records 5 short phreatomagmatic bursts in Taal Volcano

Aileen Cerrudo   •   July 8, 2021

MANILA, Philippines—The Philippine Institute of Volcanology and Seismology (Phivolcs) has recorded five short phreatomagmatic bursts at Taal Volcano.

In the latest bulletin, as of July 8, sixty (60) volcanic earthquakes, including five explosion-type earthquakes, and twenty-four low frequency volcanic earthquakes occurred at Taal Volcano.

Phivolcs also recorded 24 low frequency volcanic earthquakes, 21 volcanic tremor events having durations of two to four minutes, 10 hybrid earthquakes, and low-level background tremor that ended on Wednesday (July 8).

High levels of volcanic sulfur dioxide (SO2) gas emissions, that averaged 11,397 tonnes/day on 07 July 2021, and steam-rich plumes were also recorded. The steam-rich plumes rose 1,500 meters before drifting southwest from the Taal main crater.

Alert Level 3 prevails over Taal Volcano. The public is reminded that the entire Taal Volcano Island is a Permanent Danger Zone (PDZ), and entry into the island as well as into the high-risk barangays of Agoncillo and Laurel must be prohibited due to the hazards of pyroclastic density currents and volcanic tsunami should strong eruptions occur.

“All activities on Taal Lake should not be allowed at this time. Communities around the 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,” according to Phivolcs.

Meanwhile, Phivolcs also urged the civil aviation authorities to advise pilots not to fly  over Taal Volcano Island as airborne ash and ballistic fragments from sudden explosions and pyroclastic density currents such as base surges may pose hazards to aircraft. AAC

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