Standing at 8077 feet, Stratovolcano Mayon Volcano, the most famous of the active volcanoes of the Philippines is heading towards an eruption, according to the Philippine Institute of Volcanology and Seismology (PHILVOLCS).
On 15 September, PHILVOLCS raised the alert level of the Mayon volcano from two to three (on a scale of five), i.e., one of the most explosive volcanoes in the world is in a relatively high state of unrest.
According to the Mayon volcano update posted by PHIVOLCS around 8.00 am on 20 September, during their latest 24-hour observation period, four volcanic earthquakes and 22 rock fall events were recorded.
Vigorous steaming and the sustained crater glow was also noticed along with a persistent swelling of the edifice, which shows that magma is quite close to the crater and that "the volcano is exhibiting relatively high unrest due to the movement of potentially eruptible magma."
The scientists predicted that the frequency of volcanic quakes and tremor would increase in the future and that with the seeming trend of increasing unrest, the eruption can be expected within weeks.
On PHIVOLCS' recommendation that the six km radius around Mayon volcano be enforced as Permanant Danger Zone (PDZ) and the seven km radius as Extended Danger Zone (EDZ), owing to the danger of rock falls, landslides and sudden explosions or dome collapses, military trucks were dispatched on Tuesday, 16 September, to evacuate the residents in these areas.