Seismic activity at the volcano increased during the period 16:00 to 20:00 on 18 October but has since returned to levels experienced yesterday. More than ten volcano-tectonic earthquakes located at shallow depths beneath the volcano, were recorded during this period. A few long-period events were also recorded. The size and frequency of rockfall signals reduced overnight; some of these were observed from the eastern side of the volcano as incandescent falls of hot rock. Tremor on the Gages seismic station has been intermittent throughout the night with a slight increase in amplitude from about 22:00.
The top of the volcano has been obscured by low cloud this morning but conditions look favourable for good 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.