Philippine Institute of Volcanology and Seismology, Powered by Joomla!
TAAL VOLCANO BULLETIN 29 October 2015 8:00 A.M. PDF Print
Thursday, 29 October 2015 07:48

Taal Volcano’s seismic monitoring network did not detect any volcanic earthquake during the past 24 hours. Field measurements conducted on 22 October 2015 at the western sector of the Main Crater Lake yielded a decrease in water temperature of 33.2°C from 33.7°C, an increase in water level of 0.75 from 0.71 meter, and increase in acidity of pH 3.00 from 3.12. Ground deformation measurements through precise leveling surveys on September 21 to October 1, 2015 indicated very slight deflation of the edifice compared to May-June 2015, consistent with slight deflation recorded by continuous GPS since September 2015. Both consistently show a general inflationary trend since January 2015. Carbon dioxide (CO2) emission at the Main Crater Lake decreased to 1566 tonnes/day in October 2015 from 2300 tonnes/day in July 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.