jump to navigation

Mayon update, 17 December 2009 17 December 2009

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

Nice to see that the Phivolcs website is actually working now. Yesterday’s Mayon bulletin can be found here.

Phivolcs is reported to be considering raising the alert level for Mayon from 3 to 4, ‘hazardous eruption imminent’. Governor Salceda of Albay has said that the situation ‘is now almost alert level 4’, and Albay has declared a ‘state of calamity’ which will enable it to anticipate a raised alert level and increase the resources available to deal with the Mayon emergency. An overflight is planned to allow for an inspection of the two active lava domes within the summit crater. Judging from the quantity of incandescent material falling from the domes and rolling down the slopes of the volcano, the domes are growing rapidly, indicative of substantial magma pressure from below. Phivolcs head Renato Solidum is quoted by the Philippine Information Agency as warning that ‘unlike in the 2001 and 2006 eruptions, Mayon took weeks to months for lava domes to develop, but this time these domes are becoming bigger and bigger everyday’.

More than 30,000 people have so far been evacuated from the danger zone around Mayon: the evacuations will affect a total of around 50,000, and if the eruption intensifies as many as 120,000 local residents will have to be evacuated. The police and the military have been instructed to ensure that everyone within the danger area evacuates, whether they want to go or not. Meanwhile tourists are descending upon the area, cameras in hand.

Additional coverage: ‘Major eruption for Mayon likely’ (Manila Times), ‘Mayon evacuation almost complete’ (Malaya), ‘Curfew to be enforced in Mayon danger zone’ (Philippine Star).

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

News
Phivolcs warns Mayon volcano crisis may last for months, considers raising alert level to 4 – AHN, 17 December 2009
Albay declares state of calamityPhilippines Daily Inquirer, 17 December 2009
Mayon volcano eruption: Philippines to raise alert level to 4 soon – Brunei fm, 17 December 2009
Forced evacuations around Philippine volcano – Associated Press, 17 December 2009
Gov’t bans human activity around Mayon PDZ; NDCC assures aid to Albay – Philippine Information Agency, 17 December 2009
Restive Mayon a tourist drawManila Bulletin, 17 December 2009
Philippine volcano Mount Mayon ‘still a danger’ – BBC News, 17 December 2009

Information
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

Comments

1. Chance Metz - 18 December 2009

Another ash eruption,this time to 12,000 feet. They say this is the biggest one to date!

Received FVFE01 at 01:08 UTC, 18/12/09 from RJTD
VA ADVISORY

DTG: 20091218/0107Z
VAAC: TOKYO
VOLCANO: MAYON 0703-03
PSN: N1315E12341
AREA: PHILIPPINES
SUMMIT ELEV: 2462M
ADVISORY NR: 2009/6
INFO SOURCE: MTSAT-1R RPLL
AVIATION COLOUR CODE: NIL
ERUPTION DETAILS: VA OBS FL120 EXTD SW WAS REPORTED AT 20091218/0030Z

OBS VA DTG: 17/2359Z
OBS VA CLD: VA NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS ABV THE
VO
LCANO AT 18/0030Z FL050 060/14KT FL120 340/1KT FROM JMA NWP MODEL.
FCST VA CLD +6HR: NIL
FCST VA CLD +12HR: NIL
FCST VA CLD +18HR: NIL
RMK: NIL
NXT ADVISORY: NO FURTHER ADVISORIES=

2. Chance Metz - 18 December 2009

Looks like the eruption is getting stronger. 248 earthquakes in one day means it is getitng ready to blow!

Mayon Volcano Bulletin 4
18 December 2009

7:00 AM

Mayon Volcano (13.2576 N, 123.6856 E) manifested an increase in its activity during the past observation period. A total of two hundred forty eight (248) volcanic quakes and tremors were recorded by the seismic network. Fifty (50) of these events were explosion type, however, only seven (7) were observed during times of good visibility. These explosions produced dark gray to dark brown ash columns that reached a maximum height of up to 1000m above the summit before drifting towards southwest. Harmonic tremors were continuously recorded by the seismic instruments.

During the cloud break this morning, steaming activity ranged from dirty white to light brown in color. Night observation showed an intensified crater glow.

The advancing lava flow has now reached approximately 3 kilometers downslope from the crater while incandescent fragments from the lava pile continuously roll down along Bonga Gully reaching about 3-4 kilometers downslope. Sulfur Dioxide (SO2) emission rate was still high at 1,065 tonnes per day (t/d).

Alert Level 3 remained hoisted over Mayon Volcano. Since an increasing trend is noticeable 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.


Sorry comments are closed for this entry