A phreatomagmatic eruption in the Taal Volcano on July 1, 2021, prompted the Phivolcs to place the volcano under Alert Level 3. A phreatomagmatic eruption involves both magma and water.
The Taal Volcano may be placed from Alert Level 0 to 5, depending on its volcanic activity. Here's what you should know about volcano alert levels for Taal, according to Phivolcs:
At Alert Level 0, there is no eruption in the foreseeable future.
No eruption is imminent.
Magmatic intrusion is probable, which may lead to an eruption. However, if trend shows a decline, alert may go down to Level 1.
Now that the volcano is under Alert Level 3, Phivolcs recommended that Taal Volcano Island and high-risk barangays in the towns of Agoncillo and Laurel in Batangas be evacuated "due to the possible hazards of pyroclastic density currents and volcanic tsunami."
At this level, hazardous eruption is possible within days.
The last time Phivolcs placed Taal Volcano under Alert 4 was in January 2020. At the time, the Civil Aviation Authority of the Philippines was instructed to advise aircrafts to avoid airspace around Taal Volcano due to airborne ash and ballistic fragments that could cause hazards to an aircraft.
Eruptions at this final alert level pose extreme hazards to communities west of the volcano (such as Agoncillo) and ashfalls on downwind sectors. – Rappler.com
Read Rappler explainers on Taal Volcano: