Phivolcs keeps watch on restive Bulusan 9 January 2011Posted by admin in activity reports, Bulusan, Philippines.
The island of Luzon’s southernmost volcano, Bulusan, has been showing signs of restiveness recently with November and December 2010 marked by an upswing in seismicity and occasional explosions producing plumes (mostly low-level, but an ash plume reportedly reached 2.1 km a.s.l. on 24 December). The seismic activity has continued into the new year, with the most recent bulletin from Phivolcs reporting five earthquakes during 7-8 January 2011. Phivolcs describes the activity as ‘hydrothermal and shallow’. Bulusan remains at Alert Level 1 and an exclusion zone of 4 km radius around the volcano is in effect.