Montserrat Volcano Observatory

Daily Report
Report for the period 16:00 23 August
to 16:00 24 August 1996

Activity at the Soufriere Hills volcano during this 24-hour reporting period has been at a relatively low level, similar to that observed during the previous 24 hours. Small- to moderate-sized rockfalls from the eastern flanks of the lava dome continue to be the dominant characteristic.

Twenty six (26) small- to moderate-sized rockfalls, 1 small hybrid and 2 small volcano-tectonic earthquakes were recorded. The largest rockfalls occurred at 06:20, 14:30 and 15:07 today and probably generated very small pyroclastic flows. They were also associated with small ash clouds which were blown westward. The ash cloud at 06:20 reached a maximum height of 5,000 ft. Several episodes of low- to moderate-amplitude broadband tremor were recorded at the stations closest to the Crater, especially the Gages seismic station, throughout the reporting period.

Visibility was very poor throughout the day, with the volcano covered by clouds.

Conditions today were generally not conducive to the performance of EDM and COSPEC measurements.

Further rockfalls and pyroclastic flows will occur but all indications are that these 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. People in areas affected by ash falls should exercise great care when driving. Dust masks should be worn in ashy environments.

The Tar River Valley and surrounding areas are now extremely hazardous, and should not be entered under any circumstances. We urge individuals who continue to ignore this advice to think very seriously before making trips to these highly hazardous zones.

Montserrat Volcano Observatory