Activity at the volcano increased gradually after 4pm yesterday, and a moderate but prolonged ash eruption started at about 6.30 pm which is about the same time as the previous day. This lasted almost two hours and produced an ash cloud which rose slowly to over 10,000ft, and pyroclastic flows occurred into Mosquito Ghaut and Fort Ghaut.
There was a further period of ash eruption and pyroclastic flow generation from about 2.30 am to 4.30 am following a hybrid earthquake swarm. As before, low level tremor followed the swarm and built up into pyroclastic flow activity. This coincided with a drop in the tiltmeter readings. Much glowing could be seen from the top of the volcano, and one discrete eruption at 4.00 am produced a vigorously convecting vertical ash cloud with associated thunder and lightning.
Everyone should continue to stay alert, and listen to Radio Montserrat for any announcements. If the pattern continues, there should be a further onset of flow activity and ash generation later today. The current area of activity in the crater makes Mosquito Ghaut and Gages the most likely pathways for pyroclastic flows and surges, but further flows in Tuitt's or Tar River are possible. The Belham River valley is also dangerous and should not be entered. Access to Plymouth is completely restricted, and people should stay completely away from the flanks of the volcano.