Activity at the Soufrière Hills Volcano remains elevated. The seismic network recorded 5 volcano-tectonic (VT) earthquakes, 8 hybrid earthquakes, 13 long period (LP) events and 12 rockfall signals during the reporting period.
Periodic ash-venting has continued during the reporting period with a vigorous episode occurring at 18:00 on 18 August. Further views of the crater area were obtained on 16 August from a monitoring site on Perches Mountain. Although the views were heavily obscured by volcanic gases, the presence of a small blocky lava dome with talus slopes was confirmed. There was some ash venting from the dome but no significant rockfalls were seen.
The daily recorded sulphur dioxide flux varied from 320 tonnes per day (t/d) on 14 August to 1060 t/d on 12 August, with an average of 570 t/d for the week. This is above the long-term average for the eruption which stands at 500 t/d.

Activity at the Soufrière Hills Volcano remains elevated. The seismic network recorded 3 volcano-tectonic (VT) earthquakes, 3 hybrid earthquakes, 5 long period (LP) events and 14 rockfall signals during the reporting period.
Periodic ash-venting has continued during the reporting period with a vigorous episode occurring on 06 August which sent a plume up to approximately 6000 feet. Views of the crater area obtained on 11 August show substantial changes since the last clear view on 20 May. Although the views were heavily obscured by volcanic gases and cloud, evidence of uplift and fracturing could be observed on the crater floor. An area of blocky lava resembling a small lava dome was observed. Due to poor visibility further observations are necessary to determine if the feature is a new dome or was caused by the collapse, or uplift, of old dome rock.
The daily recorded sulphur dioxide flux varied from 260 tonnes per day (t/d) on 05 August to 1380 t/d on 10 August, with an average of 770 t/d for the week. This is above the long-term average for the eruption which stands at 500 t/d.

Activity at the Soufrière Hills Volcano remains elevated. The seismic network recorded 8 volcano-tectonic (VT) earthquakes, 4 hybrid earthquakes, 9 long period (LP) events and 33 rockfall signals during the reporting period.
Analysis of the ash from the 30 July ash-venting episode showed some differences to the 28 June ash. No pumiceous material was seen but there were a very small number of poorly vesicular glassy fragments suggesting that slightly deeper conduit material may have been involved.
The daily recorded sulphur dioxide flux varied from 300 tonnes per day (t/d) on 04 August to 2200 t/d on 02 August, with an average of 986 t/d for the week. This is above the long-term average for the eruption which stands at 500 t/d.

At 6 am (local time) on 13 June 2005, there was an increase in activity at Soufrière Hills Volcano. A series of volcano-tectonic earthquakes occurred and these were accompanied by low level tremor and a period of ash venting. The ash ascended to about 2400 m (8000 feet) and travelled to the northeast, leading to light ashfall in Lookout, Geralds and St Peters. Observers heard the sound of rockfalls from the summit of the volcano. Since 9.00 am, the activity has reduced substantially.
The events of this morning were similar to those of mid April 2005, and are probably caused by the rapid release of steam and gases from the volcano through a vent or vents at the summit of the volcano. Intense rainfall overnight may have contributed to the increase in activity. There is currently no evidence that the activity will get any worse and no evidence that fresh magma is involved. People may be exposed to an unpleasant smell and light ash fall may be experienced down wind of the volcano.
In summary, there is no cause for alarm and no indication that fresh magma is moving towards the surface.

 

Activity at Soufrière Hills Volcano remains low. The seismograph network recorded 31 rockfall signals, 2 long periods, 2 long period rockfalls, 10 hybrids and 1 volcanotectonic earthquake. All the rockfall events were small. There still appears to be a very small amount of growth in the south of the dome accompanied by occasional ash venting.
Sulphur dioxide fluxes remain low. Traverse measurements gave fluxes ranging between 100 and 250 tonnes per day over the week.
Although the activity continues to be low, the situation can change quite suddenly, with dangerous activity developing very quickly. Due to the dry conditions there is a lot of ash blowing from the old deposits on the flanks of the volcano and the Belham Valley. Ash masks should be worn in ashy conditions. In the event of heavy rain, the Belham Valley should be avoided during and after the rainfall due to the possibility of mudflow activity.
Residents of Montserrat and visitors to the island are advised to tune into ZJB Radio for up-to-date information on the volcano. Access to Plymouth, Bramble airport and beyond is prohibited. There is a maritime exclusion zone around the southern part of the island that extends two miles beyond the coastline from Trant's Bay in the east to Garibaldi Hill on the west coast. The daytime entry zone on the western side of the volcano is open for limited periods during the week.

Activity at Soufrière Hills Volcano remains low. The seismograph network recorded 54 rockfall signals, 9 long periods, 2 long period rockfalls, 48 hybrids and 1 volcanotectonic earthquake. Most of the hybrids occurred within a swarm on 20 April from 4:19 am to 7:41 am. This swarm consisted of 36 hybrid earthquakes and most of the hybrids were small. All the rockfall events were small. There has been a very small amount of growth in the south of the dome accompanied by occasional ash venting.
Sulphur dioxide fluxes remain low. Traverse and stationary measurements gave fluxes ranging between 20 and 70 tonnes per day over the week.
Although the activity continues to be low, the situation can change quite suddenly, with dangerous activity developing very quickly. Due to the dry conditions there is a lot of ash blowing from the old deposits on the flanks of the volcano and the Belham Valley. Ash masks should be worn in ashy conditions. In the event of heavy rain, the Belham Valley should be avoided during and after the rainfall due to the possibility of mudflow activity.
Residents of Montserrat and visitors to the island are advised to tune into ZJB Radio for up-to-date information on the volcano. Access to Plymouth, Bramble airport and beyond is prohibited. There is a maritime exclusion zone around the southern part of the island that extends two miles beyond the coastline from Trant's Bay in the east to Garibaldi Hill on the west coast. The daytime entry zone on the western side of the volcano has been opened for limited periods this week.

Activity at Soufrière Hills Volcano remains low. The seismograph network recorded 52 rockfall signals, 3 long period, 1 long period rockfall, 9 hybrids and 6 volcanotectonic earthquakes. All the rockfall events were small. There has been a very small amount of growth in the south of the dome.
Sulphur dioxide fluxes remain low. Traverse measurements under the plume gave fluxes ranging between 40 and 520 tonnes per day over the week; stationary measurements gave fluxes ranging between 50 and 140 tonnes per day.
Although the activity continues to be low, the situation can change quite suddenly, with dangerous activity developing very quickly. Due to the dry conditions there is a lot of ash blowing from the old deposits on the flanks of the volcano and the Belham Valley. Ash masks should be worn in ashy conditions. In the event of heavy rain, the Belham Valley should be avoided during and after the rainfall due to the possibility of mudflow activity.
Residents of Montserrat and visitors to the island are advised to tune into ZJB Radio for up-to-date information on the volcano. Access to Plymouth, Bramble airport and beyond is prohibited. There is a maritime exclusion zone around the southern part of the island that extends two miles beyond the coastline from Trant's Bay in the east to Garibaldi Hill on the west coast. The daytime entry zone on the western side of the volcano has been opened for limited periods this week.
MVO would like to wish everyone on Montserrat and overseas a peaceful and happy Easter weekend

Activity at Soufrière Hills Volcano remains low. The seismograph network recorded 62 rockfall signals, 1 long period, 1 long period rockfall, 18 hybrids and 1 volcanotectonic earthquake. All the rockfall events were small. There has been a very small amount of growth in the south of the dome.
Sulphur dioxide fluxes remain low. Traverse measurements under the plume gave fluxes ranging between 200 and 370 tonnes per day over the week; stationary measurements gave fluxes ranging between 50 and 90 tonnes per day.
Although the activity continues to be low, the situation can change quite suddenly, with dangerous activity developing very quickly. Due to the dry conditions there is a lot of ash blowing from the old deposits on the flanks of the volcano and the Belham Valley. Ash masks should be worn in ashy conditions. In the event of heavy rain, the Belham Valley should be avoided during and after the rainfall due to the possibility of mudflow activity.
Residents of Montserrat and visitors to the island are advised to tune into ZJB Radio for up-to-date information on the volcano. Access to Plymouth, Bramble airport and beyond is prohibited. There is a maritime exclusion zone around the southern part of the island that extends two miles beyond the coastline from Trant's Bay in the east to Garibaldi Hill on the west coast. The daytime entry zone on the western side of the volcano has been opened for limited periods this week.