Taal Volcano spews record SO2, vog poses health risks

Taal Volcano continues to emit sulfur dioxide, leading to the formation of volcanic smog or 'vog' in its surrounding areas.

Phivolcs recorded three short phreatomagmatic bursts and active upwelling of hot volcanic fluids at Taal Volcano on Friday, July 2.

The highest levels of volcanic sulfur dioxide (SO2) gas emission, averaging 14,699 tonnes/day, and tall, steam-rich plumes reaching 2,500 meters have been recorded on Saturday, July 3.

This elevated SO2 emission, the highest ever recorded in Taal, coupled with high humidity and low wind speeds, is likely to promote the formation of vog over the lakeshore communities of Batangas Province.

Phivolcs warned that the new spike in SO2 emission could be followed by another eruption at the main crater.

High SO2 indicates magma is already at a shallow level or near the surface of the volcano, suggesting ongoing magmatic extrusion that may further drive succeeding explosions.

Local government units are additionally advised to conduct health checks on communities affected by vog and to consider temporary evacuation of severely exposed residents to safer areas.

Phivolcs raised Taal Volcano's status to Alert Level 3 following a phreatomagmatic eruption on July 1.

Entry into the Taal Volcano Island and boating on Taal Lake are strictly prohibited.