Montserrat Volcano Observatory

Morning Update
Report for the period 16:00 03 October
to 07:00 04 October 1996

Seismic activity at the volcano has continued to be quite low overnight; the seismic network has recorded only a few small rockfall signals and one volcano-tectonic event. There has been a slight increase in the number of these rockfalls overnight with about seventeen events being recorded up until 06:41 this morning.

Views of the "October 1" dome was obtained from the airport early this morning. The new dome appears to have continued to increase in size overnight and continues to be a flat-topped feature with small rockfalls are occurring from it. It remains confined within the scar left by the 17-18 September eruption.

MVO scientists expect that rockfalls and possibly pyroclastic flows will occur as the October 1 dome increases in size and as the unstable sides of the scar stabilise. 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