Montserrat Volcano Observatory

Daily Report
Report for the period 16:00 13 June
to 16:00 14 June 1996

Actvity at the Soufriere Hills Volcano remained consistent with that of the previous reporting period except that the rockfalls were slightly larger. The activity was dominated by moderate-sized rockfalls, some of which were large enough to generate visible ash plumes. Hybrid seismicity that has been associated with dome growth in the past also continued today but at a slightly lower rate.

A total of 34 rockfall events were recorded during the reporting period. The largest of these rockfalls occurred at 05:41, 11:14 and 15:44 on June 14. These three event generated ash plumes which drifted beyond the cloud cover. There were 12 long period earthquakes and 25 well recorded hybrid events. Episodes of intermittent low-amplitude broadband tremor were recorded on the Gages and Chances Peak seismometers at various periods. These are probably due to increased steam emission from the volcano after rain showers.

Viewing conditions were generally poor today due to rain and cloud cover. Just after day break two moderate size rockfall signals were recorded. The airport control tower reported that debris flows were seen flowing from both sides of Castle Peak. Despite the poor visibility some of the ash plumes were seen from the Observatory.

Due to the prevailing weather conditions no COSPEC nor EDM measurements were made today. GPS surveys were done but the results are not yet ready.

Scientists at the Montserrat Volcano Observatory remain highly concerned about the current state of the volcano and the dangers to people and property on both the eastern and upper western flanks of the volcano. Visits to the evacuated zone should be kept to an absolute minimum. Those who must visit the evacuated areas are also reminded to stay away from the ghauts. The recent rainfalls will mobilise loose ash and soil to produce mudflows. 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 now extremely dangerous. The road between Lee's Estate and Ryners Village remains closed. People should not enter these areas under any circumstances. If they do, they put themselves and others at direct risk of very serious injury or horrible death.

Montserrat Volcano Observatory