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00 volcano icon for bulletin  This serves as a notice for the lowering of the alert status of Kanlaon Volcano from Alert Level 1 (abnormal) to Alert Level 0 (normal).

 

Kanlaon exhibited a general decline of monitoring parameters to normal/baseline values since June 2019 as detailed below, indicating a return to normalcy.

  1. Volcanic Earthquake Activity: The frequency of volcanic earthquakes recorded by the Kanlaon’s seismic monitoring network is within the baseline levels (0-2 earthquakes/day).

 

  1. Ground Deformation: Recent data from continuous GPS observations and tiltmeter show no significant changes that can be attributed to volcanic activity.

 

  1. Gas Emission: Sulfur dioxide emission or SO2 flux from the active crater is below 500 tonnes/day since August 2018.

 

  1. Visual Observation of the Summit: Degassing activity from the active vent is characterized by weak emission of steam plumes, consistent to the diminished hydrothermal activity.

 

In view of the above observations, PHIVOLCS is now lowering the alert status of Kanlaon Volcano from Alert Level 1 to Alert level 0. This means that observational parameters have returned to baseline levels and no magmatic eruption is foreseen in the immediate future. However, in the event of a renewed increase in any one or combination of the above monitoring parameters, the alert status may step up once again to Alert Level 1. The public is still reminded to avoid entry into the 4-kilometer radius Permanent Danger Zone (PDZ) due to perennial hazards of rockfalls, avalanches, sudden outgassing and steam-driven or phreatic eruption at the summit area. PHIVOLCS-DOST is closely monitoring Kanlaon’s condition and any new development will be immediately communicated to all concerned.

This will be the last bulletin for Kanlaon Volcano until new developments in monitoring parameters occur.