Montserrat Volcano Observatory

Daily Report
Report for the period 16:00 15 July
to 16:00 16 July 1996

Volcanic activity at the Soufriere Hills during this reporting period was generally similar in level to that observed during the previous twenty four hours. Small- to moderate-sized rockfalls from the flanks of the growing lava dome continue to dominate the picture.

Fifteen (15) rockfall, 13 hybrid and 14 long-period events were recorded. The largest rockfalls occurred at 17:16 and 17:32 on 15 July, and 08:42 and 12:01 on 16 July. A sprinkling of ash from the 17:32 event was noticed at Brodericks. The long-period and hybrid earthquakes were generally small. Two (2) small volcano-tectonic earthquakes were also recorded during this period and both were located at shallow depths (less than about 3 km): one beneath the northern flank of the volcano and the other beneath Chance's Peak. Intermittent low- to moderate-amplitude broadband tremor was recorded by the Gages seismic station and this is most probably indicative of increased steam emission in the Crater.

Visibility was generally poor throughout the whole observation period although there were a few short periods of partial clearance of sectors of the dome. These brief views revealed vigorous steaming from most of the dome.

GPS and EDM measurements were made today in the eastern areas but the data is still being processed. No COSPEC measurement was made today.

The Soufriere Hills Volcano is still considered to be highly dangerous to people and property on it's eastern and upper western flanks. Visits to the evacuated zone must be kept to a minimum. The Tar River and Long Ground areas to the east and upper Fort Ghaut, Gages Village and Upper Amersham areas to the west are all extremely dangerous. All access roads to these areas remain closed and 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