In the Mayon Volcano Bulletin issued today, December 19, 2014, Phivolcs said: "[s]ince the last recorded seismic swarm on 29 November 2014, a general decline in the overall activity of Mayon Volcano has been observed."
This means, Phivolcs explained, that the likelihood of hazardous eruption within days to weeks has lessened. However, the lowering of the alert status should not be interpreted that the volcano's unrest has ceased, considering that deeper beneath it eruptible magma has already accumulated.
If there is a resurgence of volcanic unrest based on any one or combination of the above monitoring parameters, the alert status may step up to Alert Level 3 again.
On the other hand, if there is a noticeable return to baseline levels of ground deformation and sustained low levels of other parameters, then the Alert Level may further step down.
The public is still reminded to avoid entry into the 6-km Permanent Danger Zone or PDZ due to perennial hazards of rockfalls, avalanche, ash puffs and sudden steam-driven or phreatic eruptions at the summit area. Furthermore, people living in valleys and active river channels are cautioned to remain vigilant against sediment-laden streamflows and lahars in the event of prolonged and heavy rainfall.--BICOLSTANDARD.COM
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