Philippine Institute of Volcanology and Seismology, Powered by Joomla!
TAAL VOLCANO BULLETIN 27 May 2015 8:00 A.M. PDF Print
Wednesday, 27 May 2015 07:34

Taal Volcano’s seismic network recorded one (1) volcanic earthquake during the past 24 hours. Field measurements conducted on May 21, 2015 at the western sector of the Main Crater Lake noted a slight decrease in water temperature from 33.2°C to 33.0°C, a decrease in water level from 0.42 to 0.35 meter, and an increase in acidity from pH 3.22 to 3.03. 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.