Government Information Service

The Volcanic Explanation
For The 24 Hour Period Ending 7 AM On Wednesday April 02, 1997
A Presentation Of The Government Information Services
In Conjunction With The MVO.

The current alert level is ORANGE

The activity at the Soufriere Hills volcano has remained at a very high level over the last 24 hours. There were further pyroclastic flows over the Galways Wall entering into the White River Valley.

The notch cut into the wall by these flows is estimated at 80 metres deep and the flows themselves have gone past the Great Alps Waterfall which has now been filled in. Ash clouds from these flows reached as high as 20,000 feet and ash was blown by prevailing winds over most of the island. There have been very heavy ash falls in Plymouth.

The seismic activity has been dominated by rockfall and pyroclastic flow signals but there have been quite a large number of long period earthquakes. There were also some hybrid earthquake signals and overnight there was a regional earthquake recorded.

Overnight the activity reduced a little but there was some rockfall and pyroclastic flow activity leading to more ashing. This morning (Weds) the dome is very clear and later today it is hoped to have a close look at the dome from the helicopter to see the changes of the last few days.

The alert level is ORANGE which means there should be no visits to Zones A and B at all and no nightime occupancy of Zones A,B,C, and D. Ash masks should be worn at all times and residents are asked to remain vigilant and stay tuned to ZJB for updates.

Government Information Service