Phivolcs advises Taal residents to wear face masks vs sulfur dioxide

Aileen Cerrudo   •   June 14, 2021   •   421

MANILA, Philippines — The Philippine Institute of Volcanology and Seismology (Phivolcs) advised residents in the immediate vicinity of Taal Volcano, especially those living in Agoncillo, Batangas to wear face masks to prevent inhalation of sulfur dioxide (SO2) being emitted by the volcano.

Plant life around the vicinity has also dried up due to the sulfur dioxide emission. Residents were also advised to stay hydrated to prevent throat irritation triggered by the volcanic gas. 

In its latest bulletin, Phivolcs reported sulfur dioxide emission at the volcano averaged 4,443 tonnes on Sunday (June 13) which drifted northwest and northeast.

“Activity at the main crater was dominated by upwelling of hot volcanic fluids in its lake which generated plumes 1000 meters tall that drifted to the northwest and northeast,” Phivolcs said.

The agency also reported that magmatic unrest continues to occur at shallow depths beneath the volcano.

Alert level 2 is still raised as Phivolcs reminds the public that sudden steam- or gas-driven explosions, volcanic earthquakes, minor ashfall, and lethal accumulations or expulsions of volcanic gas can occur and threaten areas within and around Taal.

Phivolcs also strongly recommends that entry into Taal Volcano Island, including the Taal’s Permanent Danger Zone (PDZ), must be strictly prohibited. AAC

Phivolcs lowers alert status of Mayon Volcano to Alert Level 0

Aileen Cerrudo   •   July 30, 2021

MANILA, Philippines—Alert status in Mayon Volcano was lowered to Alert Level 0 from Alert Level 1, according to the Philippine Institute of Volcanology and Seismology (Phivolcs).

In an advisory, Phivolcs reported a decline in the frequency of volcanic earthquakes for the last six months. There is also a decreasing rate of inflation of the Mayon edifice this year. Sulfur Dioxide (SO2) emission flux from Mayon crater based on continuous gas spectrometry has declined below the baseline level of 500 tonnes per day since July 14.

Due to this, no magmatic eruption is foreseen in the immediate future, according to Phivolcs. However, there is still a possibility that alert level can be raised to Level 1 if there is a renewed increase of volcanic activity.

The public is still reminded to avoid entry into the 6-km Permanent Danger Zone or PDZ due to perennial hazards of rockfalls, avalanches, ash puffs and sudden steam-driven or phreatic eruption at the summit area which may occur without warning. AAC


Phivolcs says no tsunami threat to PH after 8.2 magnitude earthquake in Alaska

Aileen Cerrudo   •   July 29, 2021


MANILA, Philippines—The Philippine Institute of Volcanology and Seismology (Phivolcs) reported that there is no tsunami threat to the Philippines after an 8.2 magnitude earthquake struck the Alaskan peninsula.

“No destructive tsunami threat exists based on available data. This is for information purposes only and there is no tsunami threat to the Philippines from this earthquake,”  Phivolcs said in an advisory.

The agency added that no action is required at this time.

According to the United States Geological Survey (USGS), an 8.2 magnitude earthquake has struck 60 miles south east of Chignik, Alaska on July 29. AAC

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.


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