25 quakes hit Taal in last 24 hrs; lake water warmer

After being relatively quiet in past days, restive Taal Volcano in Batangas
province showed intensified activity anew, with state volcanologists recording
25 volcanic quakes there in the last 24 hours.

In its Saturday update,
the Philippine Institute of Volcanology and Seismology (Phivolcs) also noted an
increase in water temperature and acidity at the Main Crater Lake.

“Taal
Volcano’s seismic network recorded 25 volcanic earthquakes during the past 24
hours. Field measurements conducted on 05 May 2011 at the eastern sector inside
the Main Crater Lake showed that the water temperature increased from 31.5 to
32.0 degrees Celsius, the water became more acidic with pH value decreasing from
3.09 to 2.94 and the water level further receded to 0.19 meters from the 0.23
meters as compared to the last reading on 19 April 2011,” it said.

Carbon dioxide emission as of May 3 and 4 was
at 2,057 tons per day (t/d), slightly down from 4,750 t/d last March but higher
than the 1,875 t/d last February.

Phivolcs said Alert Level 2 remains
over Taal Volcano with the interpretation that magma has been intruding towards
the surface.

It reminded the public the Main Crater, Daang Kastila Trail
and Mt. Tabaro are strictly off-limits because sudden hazardous steam-driven
explosions may occur and high concentrations of toxic gases may
accumulate.

“Breathing air with high concentration of toxic gases can be
lethal to (humans and) animals and even cause damage to vegetation,” it
said.

Also, it reminded the public the entire Volcano Island is a
Permanent Danger Zone (PDZ), and permanent settlement in the island is strictly
not recommended.

Phivolcs maintained entry to the 4-kilometer radius PDZ
is strictly prohibited, since the area is at risk to sudden steam and ash
explosions. — LBG, GMA News

http://www.gmanews.tv/story/219911/regions/phivolcs-25-quakes-hit-taal-in-last-24-hrs-lake-water-warmer

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