A smoke plume drifted from the crater of the Philippines' Taal Volcano amid continued seismic unrest.

Footage shows white gas clouds escaping from the volcano in Batangas province on Monday afternoon, June 12.

The Philippine Institute of Volcanology and Seismology (PHIVOLCS) said in a June 13 bulletin that 28 volcanic earthquakes were recorded within a 24-hour period, with Taal spewing 900-metre plumes of gas.

Pregnant women, children, and the elderly, especially those with underlying health conditions, were advised to stay indoors as the fumes were hazardous to their health.

Speaking to local media, PHIVOLCS director Dr. Teresito Bacolcol said: 'We remind residents to limit their outdoor activities as much as possible. They have to wear masks if they go outside.

'As of now, Taal Volcano is still under Alert Level 1. It might lead to a volcanic eruption, but it might not. Under Alert Level 1, there is the possibility of a sudden explosion - steam or phreatic explosion. That's why we are closely monitoring the volcano.'

According to PHIVOLCS, Alert Level 1 indicates 'low level of volcanic unrest'. It warned there may be steam-driven or gas-driven explosions, volcanic earthquakes, minor ashfall, and lethal accumulations or expulsions of volcanic gas.