Montserrat Volcano Observatory

Morning Update
Report for the period 16:00 05 September
to 07:00 06 September 1996

Activity at the Soufriere Hills volcano during the night continued at about the same level as observed during the previous reporting period. Two sequences of volcano-tectonic and hybrid earthquakes occurred , from 17:04 to 18:04 yesterday 05 September and from 02:38 to 06:17 today 06 September. Initial calculation of the locations of some of these earthquakes yielded shallow depths below English's Crater. Relatively few rockfalls occurred during the period but a series of rockfalls and small- to moderate-sized pyroclastic flows was recorded from 18:51 to 19:50 yesterday. Low-amplitude broadband tremor was near-continuous throughout the update period.

The dome was not visible during the early morning period because of low cloud cover on the volcano.

Further rockfalls and pyroclastic flows will occur but all indications at the moment are that the pyroclastic flows will be confined to the Tar River Valley area. However, areas affected by associated ashfalls will obviously depend on the direction and strength of the wind at the time. Extreme care should still be taken when driving in ash affected areas. Dust masks should be worn at all times in ashy environments.

The Tar River Valley and surrounding areas are extremely hazardous and should not be entered under any circumstances.

Montserrat Volcano Observatory