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TAAL VOLCANO BULLETIN 21 April 2015 8:00 A.M. PDF Print
Tuesday, 21 April 2015 06:30

Taal Volcano’s seismic network recorded four (4) volcanic earthquakes during the past 24 hours. Field measurements conducted on April 16, 2015 at the eastern sector of the Main Crater Lake yielded a slight increase in water temperature from 30.7°C to 31.2°C, a decrease in water level from 0.55 to 0.49 meter, and a decrease in acidity from pH 2.91 to pH 3.20. Ground deformation measurements through precise leveling surveys on February 17 to March 2, 2015 indicated slight inflation of the edifice compared to November 2014. Ground deformation measurements from GPS data also indicate an inflationary trend since May 2014, with the edifice being slightly inflated compared to February 2011 baseline data.  Carbon dioxide (CO2) emission at the Main Crater Lake decreased from 1980 tonnes/day in January 2015 to 1634 tonnes/day in April 2015.


Alert Level 1 remains in effect over Taal Volcano. This means that hazardous eruption is not imminent. The public, however, is reminded that the Main Crater should be strictly off-limits because sudden steam explosions may occur and high concentrations of toxic gases may accumulate. The northern portion of the Main Crater rim, in the vicinity of Daang Kastila Trail, may also become hazardous when steam emission along existing fissures suddenly increases. Furthermore, the public is also reminded that the entire Volcano Island is a Permanent Danger Zone (PDZ), and permanent settlement in the island is strongly not recommended.