Great Earthquakes In Diverse Places
Philippines: ï¿½Explosion-typeï¿½ earthquake reported at Bulusan Volcano
By Rey M. Nasol
Inquirer Southern Luzon
Posted date: November 27, 2010
LEGAZPI CITY--An "explosion-type" earthquake was recorded by the
Philippine Institute of Volcanology and Seismology in Bulusan Volcano
in Sorsogon Friday night.
In its latest bulletin, Phivolcs said that the quake occurred at around
7:27 p.m. and lasted for about 11 minutes. Clouds, however, prevented
state volcanologists to visually observe it.
The statement did not say what distinguished an "explosion-type"
earthquake from any other volcanic tremor.
Sulfur dioxide emission rate was measured at 13 tons per day.
About 11 volcanic quakes were also recorded by the seismic network
around the volcano during the past 24-hour observation period.
Phivolcs said Bulusan's status remained at alert level 1 and the public
was reminded not to venture into the four-kilometer permanent danger
zone as sudden steam and ash explosions may occur.