TAAL VOLCANO BULLETIN 06 February 2014 8:00 A.M. PDF Print

Taal Volcano’s (14.0000°N, 120.9833°E) seismic network recorded one (1) volcanic earthquake during the past 24-hour observation period. Field measurements last January 30 at the western sector of the Main Crater Lake yielded a slight decrease in water temperature of 29.5°C from 29.6°C, a decrease in water level of 0.89 meters from 1.05 meters, and decrease in water acidity of pH 2.83 from pH 2.67. Ground deformation survey in the Volcano Island on 29 November - 08 December 2013 yielded slight deflation at Calauit, Alas-as, Pira-piraso, Daang Kastila and New Eruption Site precise leveling lines compared to the September 2013 survey. GPS data from third week of October 2013 to end of December 2013 showed slight deflationary changes in ground deformation. However, the edifice is still slightly inflated in general compared to February 2011 baseline data. Carbon dioxide (CO2) emission at the Main Crater Lake decreased to 500 tonnes per day on 27 January 2014 compared to 1,700 tonnes per day last 06 July 2014.