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Mayon update, 18 December 2009: activity intensifies 18 December 2009

Posted by admin in activity reports, eruptions, Mayon, Philippines.
Tags: , , ,

The Philippine Institute of Volcanology and Seismology (Phivolcs) issued bulletin no. 4 on the eruption of Mayon at 07:00 today.

Over the previous 24 hours the bulletin reports an increase in Mayon’s activity, with 248 earthquakes and tremors recorded by the seismic network, 50 of which ‘were of the explosion type’. Harmonic tremors were continually recorded. Explosions produced ash plumes to 1000 metres above the summit, and the plume drifted south-west. Continuous steaming produced ‘dirty white to light brown’ plumes, and an intensified crater glow was visible at night. Lava has reached approximately 3 km downslope from the crater, while incandescent blocks have descended to between 3 and 4 km downslope. Sulphur dioxide emission was high at 1,065 tonnes/day. The alert level remains at 3, and Phivolcs warns that ‘Since an increasing trend is noticeable at present, the possibility of hazardous volcanic eruption is high’.

Figures for the ongoing evacuation are somewhat confused, but the Press Association reports today that more than 35,000 people have been evacuated from around Mayon, with around 10,000 more still to go. ABS-CBN News reports that ‘The Provincial Disaster Coordinating Council is expecting to evacuate all 9,946 families from the danger zones on Friday’. There is still reluctance to evacuate in some areas, and people have been re-entering the danger zone, despite the best efforts of the authorities. Farmers have been going back to tend their crops and animals.

This, from the Philippine Daily Inquirer, is a bit bizarre:

Asked about the relationship of the coming full moon with the impending explosive eruption, Baloloy [Alex Baloloy of Phivolcs] said that in the history of Mayon, it really does not follow a real pattern but several explosive eruptions have happened during or before the full moon.

For all our Mayon coverage: Mayon « The Volcanism Blog.

Mayon activities intensifyManila Bulletin, 18 December 2009
Scientists mull raising Mayon alert to level 4Philippine Daily Inquirer, 18 December 2009
‘Hazardous’ Mayon Volcano eruption likely: Phivolcs – ABS-CBN News, 18 December 2009
Major eruption of Philippine volcano imminent – Bloomberg, 18 December 2009
Farmers return to erupting Philippine volcano: govt – AFP, 18 December 2009
Residents moved from volcano threat – Press Association, 18 December 2009

Global Volcanism Program: Mayon – summary information for Mayon (0703-03=)
Philippine Institute of Volcanology and Seismology – website for Phivolcs, when it’s working

The Volcanism Blog


1. Welsh_Chris - 18 December 2009

Has anybody found a webcam for Mayon? I can’t find one

2. Chance Metz - 19 December 2009

Mayon just had another ash explosion it seems. As for a webcam for Mayon I can’t find one either which is kinda strange sicne it is so active and a tourist area.

Received FVFE01 at 03:02 UTC, 19/12/09 from RJTD

DTG: 20091219/0301Z
PSN: N1315E12341

OBS VA DTG: 19/0159Z
OBS VA CLD: UNKNOWN/FL060 N1252E12321-N1236E12307-N1231E12314-N1248E1

2326 MOV SW 20KT
FCST VA CLD +6HR: 19/0759Z SFC/FL200 N1100E12130-N1100E12200-N1200E12

200-N1200E12130 FL200/550 NO VA EXP
FCST VA CLD +12HR: 19/1359Z SFC/FL200 N1000E11900-N1000E12000-N1100E1

2000-N1100E11930-N1030E11900 FL200/550 NO VA EXP
FCST VA CLD +18HR: 19/1959Z SFC/FL200 N0830E11730-N0830E11830-N0930E1

1830-N0930E11730 FL200/550 NO VA EXP
NXT ADVISORY: 20091219/0600Z=

3. Raving - 19 December 2009

Mayon Volcano Bulletin 5
19 December 2009
7:00 AM

Mayon Volcano (13.2576 N, 123.6856 E) continued to exhibit intensified activity for the past observation period. A total of one hundred ninety seven (197) volcanic quakes and tremors were recorded by the seismic network. Eighteen (18) of these events were explosion type, however, only fifteen (15) were observed during times of good visibility. These explosions produced dirty white to grayish ash columns that reached height from 100 to 2000m above the summit before drifting towards southwest. Harmonic tremors were continuously recorded by the seismic instruments.

During cloud break this morning, steaming activity ranged from dirty white to light brown in color. Night observation showed an intensified crater glow and continuous rolling down of incandescent materials from the crater.

The advancing lava flow has now reached approximately 4 kilometers downslope from the crater along Bonga Gully. Sulfur Dioxide (SO2) emission increased from 1,065 to 2,034 tonnes per day (t/d).

Alert Level 3 remained hoisted over Mayon Volcano. Since persistent high unrest is evident at present, the possibility of hazardous volcanic eruption is high. Thus, PHIVOLCS-DOST recommends that the 6-km radius Permanent Danger Zone (PDZ) around the volcano and the 7-km Extended Danger Zone (EDZ) on the southeast flank of the volcano should be free from human activity because of sudden explosions that may generate hazardous volcanic flows. In addition, areas in the south that are outside the 7 kilometer danger zone but within 8 kilometers of the crater should be extra alert for increased volcanic activity. 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.

4. Perre - 20 December 2009

Pls type a link 4 public live webcam og Mayon here.
Im sure we r many ppl around the world who r interested.
Like me… Im on other side planet in Europe -Sweden.


5. admin - 20 December 2009

There is no public Mayon webcam that I am aware of. If I do become aware of one you may be sure the information will be posted on this blog.

6. sturmdog - 20 December 2009

I can’t get this link to work as I’m still at work but this is closest thing I’ve seen to a webcam link and I’ve been looking for over an hour

7. David - 20 December 2009

Webcam link doesn’t work for me….

8. Bill - 20 December 2009

Doesn’t work for me either it’s a old link from 08/01/06

9. Denis - 22 December 2009

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