Montserrat Volcano Observatory

Daily Report
Report for the period 16:00 23 February
to 16:00 24 February 1997
The current alert level is AMBER

The level of activity at the volcano has been very low over the last 24 hours. The pattern of earthquake swarms seems to have ceased, and there have been few rockfalls.

The main seismic activity was rockfall activity, but only 16 signals were recorded. There were also 5 small hybrid and 4 small volcano-tectonic earthquake, and one regional earthquake recorded by the seismic network.

Visibility was poor for most of the day, so no views of the dome or of Galway's Wall were possible. Reports from Spanish Pointe suggest that a large block at the top of the eastern face may have fallen yesterday evening. This may have caused the small pyroclastic flow which was recorded by the seismic network.

No EDM, GPS or COSPEC measurements were made today. The COSPEC machine is back in Montserrat after being repaired, and regular measurement of the amount of sulphur dioxide emission will resume tomorrow.

The dome is currently larger than ever before, and so further dome collapses and pyroclastic flows are expected. These will probably follow the recent pattern, but a change in the activity could occur at any time. Visitors to zone C are reminded to remain alert at all times, and spend the minimum possible time in the evacuated zone. Ash levels in Plymouth are hazardous, especially during dry, windy weather, and so it is essential to wear masks in areas affected by ash. The Tar River Valley and the upper Galway's area are very dangerous and should not be entered at any time.

Montserrat Volcano Observatory