|Taal Volcano Bulletin 01 April 2013 8:00 A.M.|
Taal Volcano’s (14.0000°N, 120.9833°E) seismic network detected one (1) volcanic earthquake during the past 24-hour observation period. Field measurements conducted on 26 March 2013 at the eastern sector of the Main Crater Lake yielded a slight increase in water temperature of 31.5°C from 30.6°C, decrease in water level of 0.45 meter from 0.51 meter and increase in acidity of pH 3.02 from pH 3.26. Ground deformation survey in the Volcano Island on 13-24 February 2013 denoted slight inflation at Calauit, Alas-as, Pira-piraso, Daang Kastila and New Eruption Site precise leveling lines. Furthermore, GPS data for the period of October 2012 to February 2013 show inflationary changes in ground deformation while the edifice is still slightly inflated in general compared to February 2011 baseline data. Carbon dioxide (CO2) emission at the Main Crater Lake increased to 947 tonnes per day on 03 March 2013 compared to 720 tonnes per day last 27 November 2012.