Montserrat Volcano Observatory

Weekly Report
Report for the period 5 p.m. 30 April 1999
to 5 p.m. 7 May 1999

Activity at the volcano has been generally lower this week when compared with the previous week.

A total of 29 rockfall signals and 57 volcano-tectonic earthquakes were recorded over the last week. The signals were evenly distributed throughout the week.

No ash-venting events were recorded during the week.

Occasional observations during the week showed that fumarolic activity was still vigorous in the area at the top of the Tar River valley. From time to time the emissions from the largest fumarole in this area were laden with ash and grey in colour. Fumarolic activity has also continued in the northern lobe of the dome where the strongest emissions were located on several sub vertical fractures.

GPS occupations of Long Ground, White's and Broderick's in conjunction with the permanent stations at Hermitage, Harris, Mongo Hill and South Soufriere were completed this week, the results of which will be reported later.

Residents of Montserrat are advised to keep listening to ZJB Radio Montserrat for information in case of any changes in the state of the volcano.

Montserrat Volcano Observatory