Government Information Service

The Volcanic Explanation
For The 24 Hour Period Ending 6 PM On Thursday December 26, 1996
A Presentation Of The Government Information Services
In Conjunction With The MVO.

Rockfall and small pyroclastic flow activity on the October 1st dome continued today (Thursday) Most of this activity is on the south side of this dome with some on the northern flank. Ashclouds, which drifted to the west were generated by many of these events.

The seismic activity is at its highest level, with hybrid events and continuous seismic tremor dominating the activity, since the banded tremors started on 22 December. The time between the peaks is now 7 hours. This activity is similar to what occurred from late July to mid September, the large pyroclastic flows and the 17/18 September explosion.

The danger of large pyroclastic flows from the dome into the Tar River Valley continues and the sudden collapse of the Galways wall which could cause the material to go down the White River into OGarros. Either of these events could be serious for much of the 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