Government Information Service

The Volcanic Explanation
For The 24 Hour Period Ending 7 AM On Friday March 21, 1997
A Presentation Of The Government Information Services
In Conjunction With The MVO.

The current alert level is AMBER

The activity at the Soufriere Hills Volcano over the past 24 hours has been at a relatively low level. The volcanic swarm of yesterday died away and since then the main activity seems to have been rockfalls which have in fact increased over yesterday.

Three large fractures were observed during yesterday in the southern buttress of Galways Wall, this for the first time.

The good visibility is continuing to allow for a full dome survey and it is obvious that the January 20th dome has grown in the summit region and has spread over the terrace formed by the October dome towards the north and northwest. This coupled with satelite views suggest that there is some deformation of the dome.

Some EDM measurements were taken on the Lower to Upper Amersham line and the Lower Amersham to Chances Peak Steps line and these show no major changes. GPS measurement of the Harris' Lookout to Hermitage line show that there is slow movement of the Hermitage site.

This morning the dome is clear and there is vigorous steaming from the north side of the pre-September dome clearly visible.

The volcano remains active and dangerous and all residents are asked to remain vigilant.

Government Information Service