Montserrat Volcano Observatory

Morning Update
0700H 22 July, 1996

Activity at the Soufriere Hills volcano during the night continued at about the same higher level as seen during the preceding 24 hours observation period.

Rockfalls, volcano-tectonic earthquakes, hybrid and long period events were recorded. The hybrid events were small while a few of the long-period earthquakes were of moderate size. A few signals possibly representing small pyroclastic flows were also present in the records. Bramble Airport control tower in fact reported small pyroclastic flows in the upper reaches of the northern part of the Tar River valley area at 17:11 on 21 July and 05:47 on 22 July. None of these travelled very far. However, further pyroclastic flows should be expected in the same area. Intermittent low- to moderate-amplitude broadband tremor occurred and was well-recorded at the stations closest to the crater.

No views of the upper flanks of the volcano could be obtained during the early morning period because of the low cloud cover.

Dome growth is continuing and therefore the threats posed by the Soufriere Hills Volcano continue at the same or a greater level as over the past several months. The Tar River and Long Ground areas to the east and the upper Fort Ghaut, Gages Village and Upper Amersham areas to the west are still extremely hazardous. People should not enter these areas under any circumstances because they put themselves and others at direct risk of very serious injury or death. People are urged to keep visits to the evacuated zone to a minimum.

Montserrat Volcano Observatory