Mayon Volcano Bulletin

25 September 2006

8:00 AM

Mayon Volcano’s (13.2576’N, 123.6856’E) seismic network detected fourteen (14) volcanic earthquakes and 114 tremor episodes during the past 24-hour observation period. A fair level of crater glow was observed and surface activity was characterized by intermittent extrusion of lava from the crater and rolling of incandescent lava fragments along the volcano’s slope, The Sulfur Dioxide (SO2) emission rate was at 1,300 tonnes/day which is still above normal levels.

Alert Level 3 remains in effect over Mayon Volcano, which means that the volcano is still at a high level of unrest. Ash explosions from the crater and secondary pyroclastic flows arising from the collapse of lava fragments may occur suddenly. PHIVOLCS reminds the public that the following zones should remain off-limits: the Extended Danger Zone (EDZ), which is the area in the southeast sector up to 7 kilometers from the summit crater, and for all the other areas around the volcano, the 6 kilometer-radius Permanent Danger Zone (PDZ).