In a Facebook post, Phivolcs said Taal Volcano's sulfur dioxide (SO2) emission has been increasing since March 6, reaching 15,900 tonnes on March 9.
Alert Level 2 (increased unrest) is maintained over the Taal Volcano, which means that sudden steam or gas-driven explosions, volcanic quakes, minor ashfall and lethal expulsions of volcanic gas may occur and threaten areas within and around the Taal Volcano Island (TVI).
For the past 24 hours, Phivolcs has recorded eight volcanic earthquakes, including four volcanic tremor events having durations of 2 to 8 minutes, and three low-frequency volcanic earthquakes.
Volcanic earthquakes are caused by movements or eruptions of magma from the volcano.
Upwelling of hot volcanic fluids in its lake generated plumes 1,200 meters high.
Phivolcs reminds the public that entry into the TVI, Taal's permanent danger zone, should be strictly prohibited especially in the vicinities of the main crater, Daang Kastila fissure.
Local government officials are advised to continuously assess and strengthen the preparedness of previously evacuated barangays around Taal Lake in case of renewed unrest. (PNA)