|TAAL VOLCANO BULLETIN 05 August 2011 8:00 A.M.|
|Thursday, 04 August 2011 23:31|
aal Volcano’s (14.0000°N, 120.9833°E) seismic network did not detect any volcanic earthquake during the past 24 hours. Field measurements conducted on 02 August 2011 at the western sector of the Main Crater Lake yielded slightly changed water temperature of 32.8°C from 33°C, water level increased to 1.08 meters from 0.81 meter and more acidic pH of 2.75 from 2.91 compared to previous readings. Ground deformation survey (precise leveling) on the Volcano Island last 21 - 28 July 2011 indicated that the volcano edifice is slightly deflated 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, which is 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.