The Philippine Institute of Volcanology and Seismology (Phivolcs) reports shifting activity at Taal Volcano in Batangas, with some periods showing reduced gas output and others marked by renewed seismic unrest. In late July, Phivolcs records show sulfur dioxide emissions from the main crater drop to “weak” levels, with 518 metric tons of SO₂ measured over a 24-hour period, down from 741 metric tons recorded from July 22 to 26. During that same interval, seismic activity is described as remaining low. Separate bulletins earlier in the month describe strong seismic episodes following eruptive activity: Phivolcs logged 61 volcanic earthquakes and 60 volcanic tremors over 24 hours on July 4, after days of lower counts, and later notes show tremor episodes while earthquakes were absent. After short-lived phreatomagmatic eruptions, Phivolcs also reports new increases in earthquakes and tremor. In July, multiple minor phreatomagmatic eruptions occur in the main crater, lasting minutes and producing ash-laden, steam-rich plumes. By Aug. 1, Phivolcs again reports reduced conditions, citing 300 metric tons of SO₂ and easing seismic activity.
Taal Volcano activity fluctuates as SO₂ emissions ease and seismic unrest varies
The Philippine Institute of Volcanology and Seismology (Phivolcs) reports shifting activity at Taal Volcano in Batangas, with some periods showing reduced gas output and others marked by renewed seism...
- Phivolcs monitors sulfur dioxide (SO₂) emissions from Taal Volcano’s main crater and reports “weak” emission levels during periods of decline (518 MT in one 24-hour report; 300 MT reported later).
- Seismic activity at Taal varies, including periods with low activity as well as intervals with heightened unrest.
- At least one major increase in seismicity is reported: 61 volcanic earthquakes and 60 volcanic tremors recorded over 24 hours in early July (July 4).
- Phivolcs logs multiple short-lived minor phreatomagmatic eruptions in the main crater during July; these produce ash-laden, steam-rich plumes and last for minutes.
- Phivolcs reports that some heightened periods follow or coincide with phreatomagmatic eruption events, while later reports describe subsequent easing of seismic activity.
LUCENA CITY – Taal Volcano in Batangas province recorded a significant increase in sulfur dioxide (SO2) emissions, while its seismic activity continued to decline, the Philippine Institute of Volcanology and Seismology (Phivolcs) reported on Wednesday (Aug. 5). In its 24-hour monitoring period, Phivolcs said Taal released 607 metric tons of SO2 on Tuesday. No visible plumes, however, were observed. The latest emission figure was more than double the 300 metric tons recorded from July 31 to Aug. 2. READ: WALANG PASOK: Baguio, other towns suspend classes again due to rains In its morning bulletin, Phivolcs reported three volcanic earthquakes and an […]...Keep on reading: Taal Volcano gas emissions rise to 607 tons, seismic activity eases
3 weeks agoLUCENA CITY — Harmful sulfur dioxide (SO₂) emissions from Taal Volcano in Batangas province have declined, while seismic activity also eased over the past 24 hours, the Philippine Institute of Volcanology and Seismology (Phivolcs) reported on Saturday, Aug. 1. In its morning bulletin, Phivolcs said only 300 metric tons of sulfur dioxide were emitted from the volcano’s main crater during the monitoring period. The volcanic plume rose about 600 meters above Taal Volcano Island — the crater island locally known as “Pulo” at the center of Taal Lake — before drifting south-southwest and north-northwest. The latest sulfur dioxide emission was […]...Keep on reading: Taal Volcano’s sulfur dioxide emissions ease, seismic activity declines
3 weeks agoLUCENA CITY — Taal Volcano in Batangas province showed increased signs of volcanic unrest after registering a rise in seismic activity over the past 24 hours as of Friday (July 31), the Philippine Institute of Volcanology and Seismology (Phivolcs) reported. Phivolcs said the volcano recorded 32 volcanic earthquakes during the monitoring period, which was a significant increase from the previous day’s monitoring, when only single-digit volcanic earthquakes were detected. Earlier this week, the volcano logged 11 volcanic earthquakes and one volcanic tremor on July 26. The highest level of seismic activity this month was recorded on July 6, when Phivolcs […]...Keep on reading: Taal Volcano logs 32 volcanic quakes in 24 hours
4 weeks agoLUCENA CITY — Harmful sulfur dioxide (SO₂) emissions from Taal Volcano in Batangas province have significantly declined, while seismic activity remained low, the Philippine Institute of Volcanology and Seismology (Phivolcs) reported on Tuesday (July 28). In its morning bulletin, Phivolcs said only 518 metric tons (MT) of sulfur dioxide were emitted from the volcano’s main crater over the past 24 hours, a level classified as weak emission. The latest measurement marked a notable decrease from the 741 MT of SO₂ recorded from July 22 to 26. READ: Renewed unrest at Taal Volcano as quakes surge, SO₂ emissions rise Seismic activity […]...Keep on reading: Taal Volcano gas emissions drop, seismic activity eases
1 month agoLUCENA CITY — Volcanic earthquakes and tremors continued to be recorded at Taal Volcano in Batangas province, although overall seismic activity declined over the past 24 hours, the Philippine Institute of Volcanology and Seismology (Phivolcs) reported on Friday (July 24). In its morning bulletin, Phivolcs said the volcano generated 31 volcanic earthquakes, accompanied by an ongoing volcanic tremor that has persisted since 5:42 a.m. on July 23. Despite the prolonged tremor, Phivolcs said there is no immediate cause for alarm, explaining that volcanic tremors are a normal occurrence at Taal Volcano. READ: Renewed unrest at Taal Volcano as quakes surge, […]...Keep on reading: Phivolcs: Taal Volcano continues to be shaken by quakes
1 month agoLUCENA CITY — The Philippine Institute of Volcanology and Seismology (Phivolcs) has detected renewed signs of unrest at Taal Volcano after recording a sharp increase in volcanic earthquakes and a rise in sulfur dioxide (SO₂) emissions over the past 24 hours as of Thursday, July 23. In its morning bulletin, Phivolcs said the volcano generated 61 volcanic earthquakes and three episodes of volcanic tremor lasting from three to 31 minutes. The latest seismic activity marked a significant increase from the previous day’s monitoring, when only single-digit volcanic earthquakes were recorded except on Wednesday (July 22), with 10 quakes. No volcanic […]...Keep on reading: Renewed unrest at Taal Volcano as quakes surge, SO₂ emissions rise
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