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Mayon Volcano Update [28 December 2009]

Posted by feww on December 28, 2009

Mayon activity remains intense

Clouds partially cover Mayon volcano, as it ejects tephra in Legazpi City, Albay province December 28, 2009. (Xinhua/Reuters Photo). Image may be subject to copyright.

Highlights of news, observations, official and unofficial reports:

  • Mayon activity remains intense
  • The lava flowed about 5.7 km from the summit crater, nearing  coconut plantations in the area
  • 7 tephra explosions
  • Tephra ejected to a height of about 2km above the summit
  • 44 volcanic earthquakes
  • 137 rock fall events
  • Fresh lava continues to flow down the Bonga-Buyuan, Miisi and Lidong gullies.
  • Sulfur dioxide emission rate reached 4,329 ton per day almost double the amount previous day.
  • Volcanic Hazard warning remains at level 4, which means an explosive eruption could occur anytime.
  • About 50,000 people are staying at 30 evacuation centers.
  • The authorities said they were setting  up an epidemiology surveillance unit at the provincial health headquarters.
  • Local government said it discouraged “disaster tourism” in the light of tourists from the US, Europe and Asia flocking to the Albay province where Mt Mayon is located.
  • A group of tourists who tried to venture into the 8-kilometer danger zone were ejected by the military at one of the nine checkpoints set up within the area.

The following Bulletin was released by The Philippine Institute of Volcanology and Seismology (PHIVOLCS) today:

Mayon Volcano Bulletin 15 released on 28 December 2009

For the past 24 hours, Mayon Volcano’s (13.2576 N, 123.6856 E) intense level of unrest persisted. Seven ash explosions were observed during times of good visibility. The explosions produced dirty white to light gray ash columns that rose to a maximum height of about 2000 meters above the summit before drifting towards the southwest.

A total of 44 volcanic earthquakes and 137 rock fall events related to the detachment of lava fragments at the volcano’s upper slopes was detected by the seismic network. Red hot lava continuously flowed down along the Bonga-Buyuan, Miisi and Lidong gullies. Intermittent rolling of incandescent lava fragments were also observed. Yesterday’s measurement of

Alert Level 4 remains hoisted over Mayon Volcano.  PHIVOLCS-DOST reiterates that the Extended Danger Zone (EDZ) from the summit of 8-km on the southern sector of the volcano and 7-km on the northern sector should be free from human activity.  Areas just outside of this EDZ should prepare for evacuation in the event hazardous eruptions intensify.  Active river channels and those perennially identified as lahar prone in the southern sector should also be avoided especially during bad weather conditions or when there is heavy and prolonged rainfall.  PHIVOLCS–DOST is closely monitoring Mayon Volcano’s activity and any new significant development will be immediately posted to all concerned.

For previous entries, additional information, photos and links to Mayon Volcano see links below:

Related Links:

One Response to “Mayon Volcano Update [28 December 2009]”

  1. […] Mayon Volcano Update [28 December 2009] […]

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