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MMEIRS

Volume1

Volume2

Philippine Institute of Volcanology and Seismology, Powered by Joomla!
Mayon Volcano Update PDF Print
Saturday, 27 February 2010 10:31

27 February 2010, 8:00 AM

Alert Level: 2

MONITORED PARAMETERS

LATEST OBSERVATIONS

 

PREVIOUS OBSERVATIONS

Seismicity

 

 

 

Three (3) volcanic earthquakes and eleven (11) rockfall events were detected by the seismic network.

The seismic network recorded a total of sixteen (14) volcanic earthquakes and forty-one (33) rockfall events (15 - 21 Feb.  2010).

 

 

Ground Deformation

 

 

 

 

 

 

 

 

Buang Leveling Line

(20 Feb. 2010 survey)

Deflation

Lidong Leveling Line

(20 Feb. 2010 survey)

Deflation

MRHO Tiltmeter

(19  24 Feb. 2010)

Deflation

 

 

Buang Leveling Line

(Jan 05 -10, 2010 survey)

Two (2.0) mm deflation relative to 27 Nov - 3 Dec 2009 survey. Overall, the volcano remains inflated by three (3.0) mm. cumulative to February 2008 baseline data

Lidong Leveling Line

(Jan 05 – 10, 2010 survey)

0.4 mm. deflation relative to 27 Nov.- 3 Dec 2009 survey. Overall, the volcano remains inflated by four  (4.0) mm. cumulative to October 2007 baseline data

MRHO Tiltmeter

( 15 – 18 Feb. 2010)

Deflation

 

SO2  Flux Reading

(FlySpec)

 

 

196 tonnes/day

(26 Feb. 2010)

 

390 tonnes/day

(25 Feb. 2010)

503 tonnes/day

(24 Feb. 2010)

559 tonnes/day

(23 Feb. 2010)

480 tonnes/day

(22 Feb. 2010)

 

Crater glow

 

 

Intensity II

 

Intensity II

 

Steaming Activity

 

 

Weak

 

                    

Wispy to Moderate   

REMARKS/RECOMMENDATION:

Alert Level 2 is in effect over Mayon Volcano.  PHIVOLCS-DOST recommends that the public should not enter the six (6) kilometer radius Permanent Danger Zone and the 7-km Extended Danger Zone on the southeast of the volcano due to continuing threat from sudden explosions, rockfalls from the upper slopes and pyroclastic flows due to sudden collapse of unstable lava deposits.  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.