Montserrat Volcano Observatory

Daily Report
Report for the period 16:00 22 June
to 16:00 23 June 1996

Activity at the Soufriere Hills Volcano has been at a low level, similar to the last four days. The activity was dominated by small rockfalls from the lava dome.

A total of 60 rockfall events were recorded during this period. Most of these signals were very low in amplitude and short in duration, indicating that the actual events were small and hence, not likely to have associated ash clouds. There were 4 hybrid events and one long period earthquake. Variable low-amplitude broadband tremor occurred from late afternoon of June 22 throughout the night and into the morning.

Low cloud cover continued to inhibit views of the upper sections of the volcano. No COSPEC measurements were carried out today.

EDM measurements were not made today due to the persistently poor viewing conditions to the top of the volcano. GPS surveys were done at Reid's Hill, Harris and Galways. Unlike the EDM which depends on clear vision to the targets on the volcano, the GPS technique uses satellite technology and is therefore not adversely affected by the weather conditions. The results of today's surveys are not yet available.

Despite the continued low level of activity the volcano remain highly dangerous to people and property on both it's eastern and upper western flanks. People who make visits to the evacuated zones expose themselves to various levels of risk, depending on the area entered. Such visits should be kept to an absolute minimum. The Tar River, Long Ground and Whites areas to the east and upper Fort Ghaut, Gages Village and Upper Amersham areas to the west are all extremely high risk zones. All access roads to these areas remain closed. People should not enter these areas under any circumstances. If they do, they put themselves and others at direct risk of serious injury or death.

Montserrat Volcano Observatory