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Mayon Volcano Update [29 December 2009]

Posted by feww on December 29, 2009

The Raging Lava Mill

Mayon Continues to Spew Lava and Eject Tephra

Lave spews out of Mt Mayon. Dated 27 December 27, 2009.
Credit: Erik de Castro, Reuters. Image may be subject to copyright.

Highlights of news, observations, official and unofficial reports:

  • 9 minor explosions during the past 24-hr observation period
  • Explosions ejected tephra to a height of 2km above the summit
  • Seismic activity high with 38 tremors recorded
  • 171 incidents of rock fall reported as lava fragments detached from Mayon’s upper slopes
  • Sulfur dioxide emission rate at 3,416 ton, almost unchanged from the previous day
  • Fresh lava flowed along the Bonga-Buyuan, Miisi and Lidong gullies
  • Lava advanced by an additional 100 meters to 5.8km from the summit crater
  • Officials have declared the area a no-fly zone
  • Tourists are strictly prohibited from entering the danger zone
  • Pilots are advised to avoid flying close to the volcano’s summit to prevent probable damage to aircraft caused by the ejected tephra.

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

Mayon Volcano Bulletin 16 released on 29 December 2009

Mayon Volcano (13.2576 N, 123.6856 E) continued to be restive and exhibited 9 ash explosions during the past 24 hours. The explosions produced dirty white to light brown ash columns that rose to a maximum height of about 2000 meters above the summit before drifting towards the west and southwest.

Seismic activity remained at high level as a total of 38 volcanic earthquakes and 171 rock fall events related to the detachment of lava fragments at the volcano’s upper slopes was detected by the seismic network. Measurements of sulfur dioxide emission rate conducted yesterday yielded an average value of 3,416 tonnes per day (t/d).

Red hot lava continued to flow down along the Bonga-Buyuan, Miisi and Lidong gullies. At present, the lava front at Buyuan channel is approximately 5.8 kilometers downslope from the summit crater. From time to time, rolling down of incandescent lava fragments coming from the crater was observed.

The status of Mayon Volcano is maintained at Alert Level 4.  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. In addition, Civil Aviation Authorities must advise pilots to avoid flying close to the volcano’s summit as ejected ash and volcanic fragments from sudden explosions may pose hazards to aircrafts. 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 [29 December 2009]”

  1. feww said

    Philippines: Volcano evacuees face months in camps

    Source: United Nations Office for the Coordination of Humanitarian Affairs – Integrated Regional Information Networks (IRIN) – Date: 28 Dec 2009

    MANILA, 28 December 2009 (IRIN) – Nearly 50,000 people are still crammed in 29 evacuation centres in the eastern Philippine province of Albay after scientists raised the alert level of the Mayon volcano from three to four on a five-step alert system on 20 December.

    Evacuees spent Christmas in the centres – schools converted into temporary shelters – and will likely spend up to four months there should the volcano continue rumbling, according to provincial authorities.

    “I have already declared my province open season for all aid agencies,” Governor Joey Salceda told IRIN.

    “They don’t have to go to my office any more to secure permission. We need all the help we can get at this hour of need.”

    Standby emergency funds from the local government may only last for four weeks, and resources were fast dwindling, he warned.

    “Our hope is that Mayon will not continue with this phase since the schools have to re-open after the Christmas break,” he said.

    But the deep rumblings, ash fall and lava flows are indicative of a dangerous and imminent eruption.

    To date, close to 10,000 families or 47,285 people from hundreds of villages in five townships inside an extended 8km danger zone have been evacuated since volcanic activity started on 14 December.

    Since the evacuation, however, many of the men were reportedly sneaking out of the camps in the daytime to check on their farms in the foothills of Mayon.

    While they are “actively being discouraged” from doing so, Governor Salceda said it was almost impossible to monitor each and every person in the camps.

    No room for complacency

    Meanwhile, experts have reiterated the need not to be complacent: Renato Solidum, head of the Philippine Institute of Volcanology and Seismology, said “a hazardous eruption remains likely within days.”

    The institute’s observatory in Legaspi city near Mayon reported at least nine ash explosions accompanied by rumblings in the 24 hours up till 7am on 28 December.

    The explosions sent ash and lava fragments up to 2,000m into the air, covering villages and towns with a thin layer of fine particles that scientists warn could also cause respiratory and skin problems.

    Some 44 volcanic quakes were also recorded by seismic machines, it said.

    Relief supplies

    Tons of relief supplies have been trucked into the evacuation centres, and temporary tent clinics and hospitals have also been set up. Water and sanitation facilities, however, were in critically short supply.

    The UN Children’s Fund (UNICEF) said it had provided over US$100,000 in supplies to address the urgent needs of children and their families, including water kits and medical supplies such as face masks.

    “Our hearts go out to the thousands of children and families who have been affected by the eruption,” UNICEF country representative Vanessa Tobin said, but expressed relief that there had so far been no reports of any casualties.

    UNICEF said it was concerned for the more than 24,000 children whose schools have been converted into temporary shelters, and promised to bring in school tents and tuition packs to ensure classes can resume after the Christmas break.

    Breathing problems

    Meanwhile, Eric Tayag, head of the National Epidemiology Centre, has advised those in evacuation centres to protect their children from Mayon’s fine ash, warning that it could exacerbate asthma, bronchitis and respiratory-related illnesses.

    “While illnesses caused by ash fall may not be that dangerous, people should take precautions and stay indoors if they can. For those in evacuation centres, prepare a wet cloth to cover the nose and mouth in cases of heavy ash fall. Those with asthma, bronchitis and emphysema should take precautions,” he said.

    “They may experience increased attacks because ash fall, when inhaled, can trigger breathing problems.”

    The 2,460m high Mayon is the most active of the Philippines 22 active volcanoes. It has erupted 48 times in recorded history, and in 1814 buried the entire town of Cagsawa, killing over 1,200 people.

    Three months after it last erupted – in August 2006 – a typhoon dislodged tons of volcanic debris from its slopes, triggering a mudslide that buried entire villages and leaving over 1,000 dead.

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