|TAAL VOLCANO BULLETIN 21 February 2011 8:00 A.M.|
|Monday, 21 February 2011 10:17|
Taal Volcano’s (14°00.1’N, 120°59.6’E) seismic network recorded three (3) volcanic earthquakes during the past 24 hours. One (1) of these events, which occurred at 9:54 AM yesterday, was felt at intensity II by residents in Barangay Calauit at the southeast side of the volcano island.Field observation and measurements conducted on 15 February 2011 at the western sector inside the Main Crater Lake (via Alas-as) showed that steaming activity at the thermal area was weak. The crater lake level further decreased from 0.74 meter to 0.64 meter. The lake water temperature remained at 30.0 0C while the pH value slightly increased from 2.83 to 2.98. Ground probe holes temperature measurements conducted at the Mount Tabaro eruption site revealed an average reading of 28.50C, a slight increase compared to 28.20C last 01 February 2011. No steaming was observed at known thermal areas. Results of the ground deformation survey (precise leveling) conducted around the Volcano Island this February showed a slight inflation as compared with the December 2010 survey.
Alert Level 1 is still enforced over Taal Volcano. This means that a hazardous eruption is not imminent. However, the public is reminded that the Main Crater should be strictly off-limits due to sudden occurrence of steam explosions and accumulation of toxic gases. The northern portion of the Main Crater rim, in the vicinity of Daang Kastila trail, may also be dangerous when increased steam emission is reactivated along existing fissures. Moreover, the public is also reminded that the entire Volcano Island is a Permanent Danger Zone (PDZ), and permanent settlement in the island is strictly not recommended.