MANILA, Philippines — Taal Volcano is swelling, a portion has sunk and the entire volcano island has tilted slightly, indicating a “resupply” of magma or molten rock rising to the surface that presages a powerful eruption amid the ongoing lull.
This was according to the Philippine Institute of Volcanology and Seismology, whose official said Taal appeared to be “recharging.” Phivolcs has maintained Alert Level 4 meaning a destructive eruption is imminent within days or even hours.
“There is resupply of magma from below based on earthquakes and ground deformation,” Science Undersecretary and Phivolcs officer-in-charge Renato Solidum Jr. said.
“The island has slightly tilted while being pushed. Some portions in the northeastern side are sinking. Maybe the houses there are already under water,” Solidum said.
Phivolcs volcano monitoring and eruption prediction division chief Mariton Bornas said the ground around the volcano has swollen except in the northeastern part. Swelling of a volcano signals an accumulation of magma near the surface.
A magnitude 4.6 earthquake shook the province.
The quake occurred at 8:59 p.m., with its epicenter traced some four kilometers southwest of Mabini, Batangas, Phivolcs said.
In Batangas, it was felt at Intensity 5 – classified as strong – in Mabini and Bauan; Intensity 4 in Batangas City and Santo Tomas; Intensity 3 in Malvar, Cuenca, Tanauan, San Pascual and Calatagan.
It was also felt at Intensity 3 in Puerto Galera, Oriental Mindoro; and in San Pablo, Laguna. In Alfonso, Cavite and San Teodoro in Oriental, Mindoro, the tremor was felt at Intensity 2.