Montserrat Volcano Observatory

Morning Update
0700H 29 April, 1996

Seismicity throughout the night has been dominated by periods of broadband tremor recorded at the nearest seismic stations and intermittent rockfall signals. A period of almost continuous broadband tremor began yesterday afternoon around 16:15 and continued until around 20:30. Following a large rockfall/explosion signal at 20:31, the broadband tremor has been discontinuous. Numerous rockfall and/or small explosion signals have been recorded throughout the night. The largest of these was the 20:31 event which may have generated a small pyroclastic flow into the Upper Tar River Valley area. Very few hybrid events have been recorded by the seismic network. At present the level of seismicity is at the elevated background level which started around midday on 26 April.

Low cloud level around the Soufriere Hills Volcano has hindered any visual observations. At 06:48 a small ash cloud was observed as the result of a rockfall from the northeastern area of the dome.

A closed-circuit television camera has recently been installed at the Observatory. This allows constant watch to be kept on the volcano during the daylight hours and will also provide data for future analysis of any ash plumes from video recordings of larger events.

Scientists at the MVO still view the situation at the Soufriere Hills Volcano with grave concern and continue to urge that visits to the evacuated zone be kept to a minimum. The Tar River, Long Ground and Whites areas are extremely dangerous, and should not be entered under any circumstances.

Montserrat Volcano Observatory