Alert Level 3 meant magmatic unrest, while Alert Level 2 indicates decreased unrest.
"Unrest since then has been characterized by renewed seismic activity, generally declining volcanic gas emission, very slight ground deformation, and positive microgravity anomalies," said Phivolcs.
The July 1 phreatomagmatic eruption, or an eruption involving the interaction of magma and water, had prompted the raising of Alert Level 3.
But Phivolcs also stressed on Friday that the downgrade to Alert Level 2 "should not be interpreted that unrest has ceased or that the threat of an eruption has disappeared."
"Should an uptrend or pronounced change in monitored parameters forewarn a potential eruption, the alert level may be raised back to Alert Level 3," the agency said.
"Conversely, should there be a persistent downtrend in monitored parameters after a sufficient observation period, the alert level will be further lowered to Alert Level 1."
Phivolcs said there has been an "overall decreasing trend in the level of monitoring parameters." Below are the data for July.
According to Phivolcs, the following can occur at Alert Level 2:
State volcanologists still recommend that entry into Taal Volcano Island be strictly prohibited. The island is considered a permanent danger zone.
Phivolcs also advised local government units in areas near Taal Volcano to "strengthen preparedness, contingency, and communication measures in case of renewed unrest."
Based on figures from the National Disaster Risk Reduction and Management Council given on Thursday, July 22, more than 21,000 persons or over 6,000 families were displaced by the Taal Volcano unrest in July. – Rappler.com