Government Information Service

The Volcanic Explanation
For The 24 Hour Period Ending 6 PM On Friday December 27, 1996
A Presentation Of The Government Information Services
In Conjunction With The MVO.

During this period activity continued on the October 1st dome with rockfalls and small pyroclastic flows. Some of these went past the Tar River Soufriere and produced moderate ash clouds and ashfall into Plymouth. One of these ashclouds reached a height of 3-5,000 feet and was approximately 60 miles wsw of the volcano. The viewing last night showed that the eastern face of this dome is very active.

The banded seismic tremor peaked at 9 pm yesterday and was the largest to date. The interval between peaks has reduced to about 5 hours and they have reduced in size. There were 44 rockfall events recorded today (Friday).

Theodolite and gravity measurements were taken today, the initial processing shows few changes since yesterday. EDM measurements were made late yesterday and the data is being processed.

There is still a danger of large pyroclastic flows into the Tar River Valley and the sudden collapse of the Galways Wall. Either o these could be serious for much ofthe evacuated areas.

The alert level remains at ORANGE which means there should be on one in Zones A,B,C, and D on the revised volcanic alert map for December. No one should try to sightsee the volcano from within these zones during the holiday period.

Government Information Service