This statement was issued by the members of Scientific Advisory Committee (SAC) on 11 March 2009.
After three months of relatively little surface activity following the explosion of 28 July 2008, there was a period of one month of lava extrusion that was preceded by explosions on 2 December 2008 and culminating in further explosions on 3 January 2009. This new lava was extruded from a vent high on the western, Gages, side of the dome. Pyroclastic flows from this activity reached the sea at Plymouth, White River and entered the Tyer's Ghaut reaching as far as Lees. The new lava added to the dome on the western side increases the mass available to any collapse to the west or north. Since early January there has been no further lava extrusion. It appears from the current degassing and incandescence that the lava vent has become more centralised.
Read more: SAC 12 Preliminary Statement