Government Information Service

The Volcanic Explanation
For The 24 Hour Period Ending 7 AM On Wednesday April 30, 1997
A Presentation Of The Government Information Services
In Conjunction With The MVO.

The current alert level is AMBER

Over the last 24 hours the activity at the Soufriere Hills Volcano has been at a low level. There were in the region of 100 rockfall signals over the reporting period and also two dozen long period earthquakes.

The dome continues to grow at a steady moderate level but because of low cloud cover for the past few days it has not been possible to see the dome at all.

Yesterday (Tuesday) the helicopter went to the top of Chances Peak to pick up the GPS equipment that had been placed there for the long occupation measurements and repositioned it on the crater wall at Farrell's where it will be collected later today. Both these measurements are to help scientists at the MVO to determine whether or not there has been long term deformation in the crater area.

Overnight and very early this morning there was some small pyroclastic flow activity over Galways Wall into the White River Valley from the active area of the dome complex.

The alert level remains at AMBER and this means that Zone A which includes the danger areas of the Tar River Valley and the White River Valley is a designated "no go" area and should not be visited at all. Short visits for persons with a rapid means of exit are possible for the other unsafe zones but everyone is warned to wear their dust masks as these areas are very ashy.

The siren system will be tested today (Wednesday) in the various modes now available to the system.

Government Information Service