According to the Philippine Institute of Volcanology and Seismology (Phivolcs), the region has been hit by a series of small tremors on Sunday.
The first hit at 5.40am, followed by six others at 07.25am, 2.59pm, 3pm, 4.49pm, 8.01pm and 8.21pm, 9.42pm.
READ MORE: Mayon volcano alert level raised to THREE as ERUPTION spews ash cloud
The earthquakes were recorded at varying magnitudes – beginning at 2.9 and moving on to record at 2.4, 2.8, 2.5, 2.2, 3.4, 2.3 and 2.4.
The earthquakes come as the Mount Mayon volcano, located in the Albay province of central Philippines, erupted on Saturday afternoon – followed by a further five-minute eruption on Sunday morning.
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Phivolcs raised the alert to level 2 in the early hours of Sunday, which means that the current activity is “probably of magmatic origin, which could lead to more phreatic eruptions or eventually to hazardous magmatic eruptions.”
A phreatic eruption, also known as a phreatic explosion, occurs when magma heats ground or surface water, resulting in steam rising into the sky.
And just a few hours later, the threat was raised again from two to three as Phivolcs warned of “hazardous eruption” within weeks or days as Mayon Volcano has exhibited “high unrest” and its magma is at the crater.
Under Alert Level 3, the extension of dangerzone in the sector where the crater rim is low will be considered.
A second ash eruption was recorded before noon on Sunday, but Phivolcs said in a subsequent bulletin that it was maintaining alert level 2.
Mayon’s most destructive eruption was in February 1841, when lava flows buried a town and killed 1,200 people. It last erupted in 2014, spewing lava and forcing thousands of people to evacuate.
People are not allowed to stay within a six-kilometre “permanent danger zone” of the volcano, known for its near-perfect cone shape, following the “phreatic or steam-driven eruption”, Phivolcs said.
This also suggests there is no imminent major eruption, but the disaster agency said it had ordered the evacuation of residents for the safety of their health due to expected ashfall.