Philippine Institute of Volcanology and Seismology, Powered by Joomla!
TAAL VOLCANO BULLETIN,02 August 2011,8:00 A.M. PDF Print
Tuesday, 02 August 2011 07:26

Taal Volcano’s (14.0000°N, 120.9833°E) seismic network detected three (3) volcanic earthquakes during the past 24 hours. One of these events which occurred at 2:11 AM this morning was felt at Intensity II by residents of Barangay Calauit in the southeastern part of the Volcano Island.  Field measurements on 26 July 2011 at the eastern sector of the Main Crater Lake recorded water temperature at a steady 33.4°C, water level increase of 0.91 meter from last week’s 0.86 meter, and pH of 2.86 similar to those of 12 July 2011.  Minimal bubbling activity was observed at the center of the Main Crater Lake.  Ground deformation survey (precise leveling) on the Volcano Island last 21 - 28 July 2011 indicated that the volcano edifice is slightly deflated as compared with the 01-10 June 2011 survey. Carbon dioxide (CO2) emission recorded on 27 June 2011 at the Main Crater Lake was 1,821 tonnes/day above background levels.

Taal Volcano’s status remains at Alert Level 1, meaning 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.