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Posts Tagged ‘Mayon tephra’

Mayon Volcano Update [31 December 2009]

Posted by feww on December 31, 2009

Mayon Pipes Down, for Now

The Contrast: “Disaster Tourism” Booms as Boredom Sets in Among the Evacuees!


Lava flow from the crater of Mayon volcano as viewed from Lignon Hill in Legazpi city, Albay province, December 30, 2009. Credit: Bullit Marquez/ AP. Image may be subject to copyright.

Highlights of news, observations, official and unofficial reports:

  • Thick clouds covered the volcano summit affecting visibility
  • No ash explosion during times of good visibility
  • Steam and ash spewed from volcano
  • 60 volcanic earthquakes recorded
  • 267 rock fall events reported
  • SO2 emissions rate down to 1,158 tonnes per day
  • volcano edifice remains inflated
  • Volcano hazard alert remained at Level 4 (explosive eruption could be imminent)

Other Headlines:

  • Seismic activity increasing in Mindanao, Philippines, with several several quakes measuring 5.0 to 5.7Mw reported in the region.
  • At least two quakes measuring 5.2 and 5.6 Mw struck near Leyte, Philippines in the past 24 hrs.

Human Angle:

Albay Governor Joey Salceda ordered the electricity and water supplies to be cit off to properties within the extended and permanent danger zones near Mayon Volcano yesterday, the Manila Bulletin reported.

Salceda said he wanted to discourage people from entering their homes withing the danger zone, after reports that many evacuees had returned to their homes for the New Year.

“Legally, there should be no people within the declared danger zones because of the provincial ordinance of the implementation of a 24-hour curfew. It is on this premise that I ordered that electricity and water supplies should be cut off,” he added.

“By Thursday afternoon (December 31), Salceda said he is also expecting the security forces to cut off the roads leading to all affected barangays in the cities of Tabaco, Legazpi and Ligao and the towns of Guinobatan, Camalig, Daraga, Malilipot and Sto. Domingo.” Manila Bulletin reported

“All the hotels are fully booked, even the cheapest ones,” Salceda told reporters.

The Contrast: “Disaster Tourism” Booms as Boredom Sets in Among the Evacuees!


As the hotels in the Albay Province are filled to capacity with overenthusiastic, “disaster tourism” visitors, boredom sets in among the evacuees. AP Photo/Mike Alquinto. Image may be subject to copyright.

Mayon Volcano Bulletin 18 released on 31 December 2009

For the past 24 hours, Mayon Volcano’s (13.2576 N, 123.6856 E) activity was characterized by extrusion of lava and rolling down of incandescent lava fragments along the Bonga gully. The summit of the volcano was obscured most of the time yesterday due to thick cloud cover. No ash explosion was observed during times of good visibility. Emission of very weak to moderate volume of white steam that drifted towards west- southwest was observed during clear views of the crater.

Seismic monitoring revealed the occurrence of 60 volcanic earthquakes. A total of 267 rock fall events related to the detachment of lava fragments at the volcano’s upper slopes was also detected by the seismic network. Sulfur Dioxide (SO2) emission rate measurements yesterday yielded an average value of 1,158 tonnes per day (t/d). The volcano edifice remains inflated as indicated by the electronic tilt meter installed at the northeast sector of the volcano.

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:

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Posted in Mayon activity, Mayon SO2, Mayon Volcano, Mt Mayon, Philippines volcanoes | Tagged: , , , , , , , , | Leave a Comment »

Mayon Volcano Update [30 December 2009]

Posted by feww on December 30, 2009

Mayon Calmer, But it Could Be the Lull Before the Storm

It would be very helpful if PHIVOLCS released more detailed information on Mayon status!

Highlights of news, observations, official and unofficial reports:

  • Minor ash explosions down to one
  • Tephra ejected to a height of 100 meters above the summit
  • Continuous lava flow down Bonga-Buyuan, Miisi and Lidong gullies
  • Lava front traveled an additional 100 meters to a distance of 5.9 km from th esummit
  • 16 volcanic earthquakes recorded
  • 150 rockfall events caused by lava fragments detaching from the upper slopes
  • SO2 emission rate of 4,397 tons per day almost a third higher than the previous day
  • The edifice remains inflated

The Human Angle

  • About 50,000 people are still crammed in 29  evacuation centers in the country’s eastern province of Albay.
  • Local schools are doubling as makeshift evacuation centers.
  • The evacuees may have to spend several months in the centers.
  • But schools are supposed to open after New Year holidays.
  • Water and sanitation facilities are in critically short supply, UNICEF said.
  • Evacuees have been advised to protect their children from Mayon’s fine ash, because it could worsen asthma, bronchitis and respiratory-related illnesses; however, face masks are reportedly in short supply.
  • At least four people have died in the evacuation centers so far. A 3-year-old from an unspecified infection and three elderly people from heart attacks, health officials have revealed.
  • Crowding and cramp conditions have already led to widespread skin diseases and respiratory illnesses throughout the 29 shelters.
  • Food isn’t in short supply, but there’s a shortage of items such as nappies for babies and sanitary towels for women, according to a local news bulletin.
  • “The evacuees face the grim prospect of being away from home for several more weeks—local disaster officials said the worst case is six more months since Mayon Volcano remains under Alert Level 4 indicating imminent eruption.” The report said.
  • An elected official of Legazpi City, Councilor Celoy Chan, has been “renting his All Terrain Vehicles (ATVs) to foreign tourists [in direct contravention of the emergency laws] and even escorting them for a trip right near the lava front of the Mayon volcano.” A news report said.
  • Evacuees in Legazpi City and Tabaco City shelters are being “shortchanged.” That is, they are only receiving half the amount of relief goods, especially rice, allocated to them.  Every family is allocated 5 kilograms of rice daily but they only receive 2 ½  to 3kgs, according to another report.
  • Province of Albay officials say about 2,500 tourists per day are flocking into the region to see Mayon activity, a rise of about 15 folds since the volcano became restive on December 14.

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

Mayon Volcano Bulletin 17 released on 30 December 2009

For the past 24 hours, one ash explosion occurred at Mayon Volcano (13.2576 N, 123.6856 E). The explosion produced a dirty white ash column that rose to about 100 meters above the summit and drifted to the northwest. Lava continued to flow down along the Bonga-Buyuan, Miisi and Lidong gullies. The lava front has now reached about 5.9 kilometers from the summit along the Bonga-Buyuan gully.

Mayon Volcano’s seismic network recorded 16 volcanic earthquakes. A total of 150 rock fall events related to the detachment of lava fragments at the volcano’s upper slopes was also detected by the seismic network. Yesterday’s measurement of Sulfur Dioxide (SO2) rate yielded an average value of 4,397 tonnes per day (t/d). The volcano edifice remains inflated as indicated by the electronic tilt meter installed at the northeast sector of the volcano.

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:

Posted in Mayon activity, Mayon SO2, Mayon Volcano, Mt Mayon, Philippines volcanoes | Tagged: , , , , , , , , | 1 Comment »

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:


Posted in Mayon activity, Mayon SO2, Mayon Volcano, Mt Mayon, Philippines volcanoes | Tagged: , , , , , | 1 Comment »

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:


Posted in Mayon activity, Mayon Volcano, Mt Mayon, Philippines volcanoes, SO2 emissions at mayon | Tagged: , , , , | 1 Comment »