Montserrat Volcano Observatory

Morning Report
Report for the period 16:00 04 October
to 07:00 05 October 1996

The volcano has been relatively quiet overnight. Many small rockfall signals have been recorded overnight, probably caused by rockfalls from the October 1 dome. The number of these rockfalls has increased slightly since yesterday, although there have been less during the last few hours. The only other significant events have been a period of tremor recorded at the Gages seismic station from 2100 last night to 0400 this morning. This tremor is probably due to the movement of hot water and steam within the volcano.

The volcano is cloudy this morning, and no views of the new dome have been obtained. Observations yesterday suggested that the dome is still growing. It is flat-topped with steep sides, and lies in the bottom of the scar within the dome complex which was caused by the explosion on 17/18 September.

MVO scientists expect more rockfalls will occur as the October 1 dome increases in size. Further pyroclastic flows are possible. All indications are that the rockfalls and pyroclastic flows will be confined to the Tar River valley area but ashfalls may affect other areas. Dust masks should be worn at all times in ashy environments, which may persist for some time as ash dries out and blows around. Drivers should exercise caution and consideration for other road users, especially when driving through areas still affected by ash or gravel.

Individuals put themselves in extreme danger if they venture beyond Long Ground into the Tar River valley. All individuals passing checkpoints in whatever part of the island are reminded that they are entering areas which may become unsafe very quickly, and everyone should be on maximum alert in all of these areas. All residents of southern Montserrat are asked to once again ensure that they are familiar with evacuation procedures.

Montserrat Volcano Observatory