During 24 June to 1 July, seismic and volcanic activity at Soufrière Hills was elevated in comparison to the previous week. Periodic episodes of intense ash venting continued during the report period, culminating in an explosive event beginning on 28 June at 1306. During the event, ballistics were ejected onto the Farrell's plain (to the NW) and a column collapse produced pyroclastic flows.
Seismic and volcanic activity at Soufrière Hills were at elevated levels during 17-24 June. The seismic network at the volcano recorded 8 hybrid earthquakes, 5 long-period earthquakes, 4 volcano-tectonic earthquakes, and 3 rockfalls. On 27 June a steam and ash cloud at ~3 km (9,800 ft) a.s.l. was reported to be drifting W.
mer., 15 juin 2005, 06:00
Seismic and volcanic activity at Soufrière Hills were at elevated levels during 10-17 June. The seismic network at the volcano recorded 17 hybrid earthquakes, 20 long period earthquakes, 46 volcano-tectonic earthquakes, and 7 rockfalls. A period of ash venting that began on 13 June at 0600 declined in intensity during the report week.
Read allmer., 8 juin 2005, 06:00
On 13 June at 0600 there was an increase in volcanic and seismic activity at Soufrière Hills. A series of volcano-tectonic earthquakes was accompanied by low-level tremor and a period of ash venting. An ash plume reached a height of ~2.4 km (7,900 ft) a.s.l and drifted NE, depositing light ash in Lookout, Geralds, and St.
Read allmer., 1 juin 2005, 06:00
The seismic network at Soufrière Hills recorded 8 volcano-tectonic earthquakes during 27 May to 3 June. Steam venting continued on the NW side of the crater. The daily recorded sulfur-dioxide flux ranged from a low of 167 metric tons per day (t/d) on 2 June to a maximum of 392 t/d on 30 May, with an average of 261 t/d for the week.
Read allmer., 25 mai 2005, 06:00
During 20-27 May, the seismic network at Soufrière Hills recorded 67 volcano-tectonic earthquakes (mostly during 20-21 May) and steam venting continued on the NW side of the crater. A sulfur-dioxide flux of 880 metric tons was recorded on 26 May, above the long-term average of 500 metric tons per day.
Read allmer., 18 mai 2005, 06:00
During 13-20 May, the seismic network at Soufrière Hills recorded 18 volcano-tectonic earthquakes (most occurred on 17 May) and 3 hybrid earthquakes. Steam venting that began on the NW side of the crater on 15 April continued. The daily recorded sulfur-dioxide flux varied from a low of 222 metric tons per day (t/d) on 16 May to a maximum of 363 t/d on 14 May, with an average of 286 t/d.
Read allmer., 11 mai 2005, 06:00
The seismic network recorded 38 volcano-tectonic (VT) earthquakes, one hybrid earthquake and one rockfall during 6-13 May. Steam venting on the NW side of the crater continued. The daily recorded sulfur dioxide flux varied from a low of 221 metric tons per day (t/d) on 11 May to a maximum of 537 t/d on the 9th.
Read allmer., 4 mai 2005, 06:00
Steam venting continued during the week of 29 April-6 May from the NW side of the crater. Sulfur dioxide flux measurements were made every day, resulting in an average of 439 metric tons/day, below the long-term average for the eruption (500 tons/day).
Read allmer., 27 avril 2005, 06:00
Steam venting that began at the NW side of Soufrière Hills'crater on 15 April continued during 22-29 April. An average sulfur-dioxide flux of 304 metric tons per day was measured during 4 days in the report week. This value was below the long-term eruption average of 500 metric tons per day.
Read allmer., 20 avril 2005, 06:00
Beginning on 15 April, vigorous steam-and-ash venting occurred on the NW side of Soufrière Hills crater. It was accompanied by tremor, which decreased during the following days and stopped on 18 April. Rainfall on 21 April caused a small mudflow in the Belham River Valley to the NE of the volcano.
Read allmer., 16 mars 2005, 06:00
Seismic activity at Soufrière Hills remained at low levels during 11-18 March. The seismic network recorded six volcano-tectonic earthquakes and one rockfall. The sulfur-dioxide flux ranged between 235 and 630 metric tons per day, with an average of 425 metric tons per day.
Read allmer., 9 mars 2005, 06:00
Seismicity remained at low levels at Soufrière Hills during 4-11 March. The sulfur-dioxide flux remained around the same level as the previous week, with an average of 695 metric tons recorded daily. During the week, a strong sulfurous smell was noticed across the northern part of Montserrat.
Read allmer., 2 mars 2005, 06:00
MVO reported that during 25 February to 4 March, seismic activity at Soufrière Hills remained at low levels. The sulfur-dioxide flux remained fairly stable, averaging 672 metric tons per day. FTIR (Fourier-Transform Infrared Spectroscopy) measurements on 3 March yielded a hydrogen chloride to sulphur dioxide mass ratio of .35, showing no significant change since the last measurement in February.
Read allmer., 2 févr. 2005, 06:00
During 28 January- 4 February, seven long-period, one volcano-tectonic, and two hybrid earthquakes were recorded at Soufrière Hills. On 28 January, the daily sulfur-dioxide flux was 410 metric tons. No significant morphological changes were observed at the volcano's edifice during a flight on 1 February.
Read allmer., 19 janv. 2005, 06:00
During 14-21 January, at Soufrière Hills two hybrid earthquakes and two rockfalls were recorded by the seismic network. Sulfur-dioxide flux rates of 300 and 380 metric tons per day were recorded on 15 and 16 January, respectively. No significant change in the morphology of the volcanic edifice was seen during an observational flight on 19 January.
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