Government Information Service

The Volcanic Explanation
For The 24 Hour Period Ending 7 AM On Tuesday April 15, 1997
A Presentation Of The Government Information Services
In Conjunction With The MVO.

The current alert level is ORANGE

Activity at the Soufriere Hills Volcano has been at a low level for the past 24 hours. With small earthquake swarms and rockfalls

There were no volcano-tectonic or long period earthquakes yesterday and only 20 rockfalls (Monday).The Gages seismometer did record low amplitude tremors during the day. A swarm of hybrid earthquakes started at 1:10 am today (Tuesday) and is still continuing. There were 53 hybrid earthquakes during this period.

Good views of the dome above Galways Wall yesterday showed new material is rapidly filling the 11th of April scar and that rockfalls are filling in the chute in the wall. Pyroclastic flow deposits are filling in the deeper parts of the White River Valley. Approximately 10m or 30 feet of new material were deposited and has covered the Great Alps Waterfall completely.

Visibility is very good this morning and there is a little steam around the summit. The GPS readings show very little change on the western side of the volcano.

The volcano remains active and dangerous, with a very large dome which could collapse at any time. People should exercise extreme caution and remain vigilant at all times. Ash levels are high and everyone is urged to wear their dust masks in ashy areas.

Government Information Service