Wednesday, September 24, 2014

#MayonPH: Areas that could be affected by lava, pyroclastic, and lahar flows


Hazard map released by the Philippine Institute of Volcanology and Seismology (PHIVOLCS) showing areas that could be affected by lava, pyroclastic, and lahar flows if Mayon Volcano erupts
Mayon Volcano’s (13.2500°N, 123.6833°E) seismic network recorded four (4) rockfall events during the past 24-hour observation period, according to the Mayon Volcano Bulletin released at 8 o'clock this morning. Weak emission of white steam plumes drifting southwest was observed. Crater glow was not observed last night. Sulfur dioxide (SO2) flux was measured at an average of 569 tonnes/day on 23 September 2014, lower than the 1048 tonnes/day recorded on 22 September 2014. Ground deformation data showed no significant change from August 2014 based on the 21-23 September 2014 precise leveling survey although the edifice remains inflated compared to baseline measurements. Tilt data also indicate continuous inflation at the base of the edifice since August 2014. All the above data indicate that the volcano is still in a state of unrest due to the movement of potentially eruptible magma.

Related: Mayon eruption is biggest tourist event this year—Salceda

Mayon Volcano’s alert status remains at Alert Level 3. This means that magma is at the crater and that hazardous eruption is possible within weeks. It is recommended that the 6-km radius Permanent Danger Zone (PDZ) around the volcano and the 7-km Extended Danger Zone (EDZ) on the southeastern flank be enforced due to the danger of rock falls, landslides and sudden explosions or dome collapse that may generate hazardous volcanic flows. PHIVOLCS maintains close monitoring of Mayon Volcano and any new development will be communicated to all concerned stakeholders.

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