Montserrat Volcano Observatory

Daily Report
Report for the period 16:00 on 10 October
to 16:00 on 11 October 1995

Twenty-four (24) earthquakes were located during the period under review. These were all volcano-tectonic events which were all clustered beneath the Soufriere Hills volcano and in the Tar River-Long Ground area. The events were generally of a shallow depth (0-4km). Most of the events were part a series of V-T's that accompanied the opening of a new vent at 00:21 on 11th October, in the Tar River section of Castle Peak dome. Several of the events were felt in the Long Ground area.

There was an eruption at 00:21 from the new vent at the Tar River section of Castle Peak dome. This resulted in deposition of ash in Plymouth, Upper Gages, Parsons, Tar River and surrounding areas. This event damaged or destroyed the EDM reflector at the Tar River EDM site.

There were two eruptions during the early afternoon, at approximately 15:40 and 17:00. These resulted in light ashfalls in Plymouth and other areas.

Despite the very poor visibility, some visual observations were made of the crater area from the crater rim. The dome has not changed in size significantly from the last observation. Steam emissions continue from the top section of the dome. Generally steam emissions from the crater area has increased. The July 18th vent appears to be larger and deeper and steam is also being emitted from this vent.

EDM sites were occupied today. There has been no significant changes in the measurements since these sites were occupied two days ago. The Tar River site was not occupied since the reflector appears to have been damaged or destroyed.

Montserrat Volcano Observatory