Activity at the volcano has continued at about the same level as yesterday. Several small to moderate sized rockfall signals were recorded overnight. The largest event was recorded at 01:53 on 21 October, this was of similar size to the large rockfall event which occurred at 11:35 yesterday. A few volcano-tectonic events were recorded overnight, most of these were at very shallow depths beneath the volcano. Intermittent tremor was recorded on the Gages seismic stations for most of the night with one period of continuous tremor between 22:40 last night and 00:40 today.
The top of the volcano was obscured by low cloud during the night and early morning so no views of the crater area have been possible. However, conditions look favourable for some views to be obtained later today.
The volcano remains in a highly dangerous condition. The October 1 dome continues to grow at a high rate, and further pyroclastic flows are likely. All residents of Montserrat are urged to exercise caution while visiting the evacuated zone and to become familiar with the new alert system and evacuation procedures. The Tar River and Long Ground areas are extremely dangerous, and people entering these areas face a high risk of death.