Manila, Sept. 2 -- The public is advised to take precaution against possible volcanic smog (vog) formation from the Taal Volcano.

The Philippine Institute of Volcanology and Seismology (Phivolcs) has recorded a recent sharp increase in the volcano's sulfur dioxide (SO2) emission, indicating fluid movement or gas changes.

According to Phivolcs Director Teresito Bacolcol, Taal Volcano' s SO2 emission measured 450 tonnes on Aug. 27, but increased to 4,514 tonnes on Aug. 30.

The tenfold increase, he said, may be attributed to the sudden release of larger volumes of volcanic gas from magma due to pressure or fluid movement beneath the volcano.

"This does not mean that an eruption will occur immediately. The public, however, should be aware...