The activity at the Soufriere Hills volcano during this period was of the same general pattern as that during the previous observation period. Three periods of sustained, high-amplitude, low-frequency tremor were recorded at intervals of about 4 hours. These episodes started with either a series of small VTs followed by small, near-repetitive hybrid earthquakes or with just the small near-repetitive hybrid events. These hybrid events then increased in frequency and amplitude until they formed a continuous tremor. After a period of sustained peak amplitude, the signal then decayed first into smaller hybrid events and then background. Several rockfalls also occurred and two of these at 17:15 on 30 July and 05:50 on 31 July resulted in ash clouds and ashfall in the Upper Gages area, St. George's Hill and Fox's Bay. None of these seem to have been associated with pyroclastic flows.
While the current phase of activity at the Soufriere Hills volcano continues, hazards in some areas of the evacuated zone have increased significantly. The Tar River Valley and surrounding areas are now extremely hazardous, and should not be entered under any circumstances. If activity continues, there is a risk that flows or ash surges may come over the Farrells' Wall. People are advised not to work areas beneath Farrell's Wall. We therefore urge individuals who continue to ignore this advice to again think very seriously before making trips to these highly hazardous zones.