Soufriere Hills volcano, Montserrat, West Indies (UK): news & activity updates
Mise à jour: 23 mai 2022 18:52 GMT - Refresh
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mer., 31 déc. 2003, 06:00
Volcanic activity at Soufrière Hills was low during 26 December to 2 January, with low counts of all seismic signals. The seismic network recorded 2 rockfalls, 9 hybrid earthquakes, and a swarm of small hybrid earthquakes during 31 December to 2 January. A sulfur-dioxide flux rate of 500 tons per day was measured at the beginning of the report period, but instrument problems and unfavorable wind directions hampered measurements during the rest of the week. Read allmer., 24 déc. 2003, 06:00
Volcanic activity at Soufrière Hills remained low during 19-26 December, with low counts of all seismic signals. The seismic network recorded 1 rockfall and 2 hybrid earthquakes until 24 December. Read allMontrer plus
mer., 17 déc. 2003, 06:00
During 12-19 December, volcanic activity at Soufrière Hills was low, with few counts of all types of seismic signals. Only 2 rockfalls and 12 hybrid earthquakes were recorded. Sulfur-dioxide emissions remained fairly stable at around 500 tons per day during most of the week, but there was a significant increase to 3,600 tons on 18 December. Read allmer., 10 déc. 2003, 06:00
Volcanic activity at Soufrière Hills was at low levels during 5-12 December, with low counts of all types of seismic signals. Visual observations confirmed that no new lava-dome growth occurred in the crater since July 2003, although some old lava-dome material from the crater walls had slumped and wall rocks had degraded due to steaming. Sulfur-dioxide flux measurements varied during the week from 800-900 tons per day at the beginning of the report period to 300-500 tons per day towards the end of the week. Read allmer., 26 nov. 2003, 06:00
Volcanic activity at Soufrière Hills was lower during 21-28 November than during the previous week, with fewer hybrid earthquakes and low counts of other types of seismic signals. The seismic network recorded five rockfalls, one long-period earthquake, one volcano-tectonic earthquake, and 50 hybrid earthquakes. Around 500 tons of sulfur dioxide were recorded during the 2 days weather conditions were appropriate for measurements. Read allmer., 12 nov. 2003, 06:00
During 7-14 November, volcanic activity at Soufrière Hills remained at low levels. The seismic network recorded three rockfall signals, one long-period earthquake, one long-period rockfall, and 36 hybrid earthquakes. Sulfur-dioxide emissions generally decreased from ~800 to ~200 tons per day during the report period. Read allmer., 29 oct. 2003, 06:00
Volcanic activity at Soufrière Hills during 24-31 October remained at low levels. No morphological changes were seen at the volcano's summit and no new lava was observed in the vent area. According to the Washington VAAC, on 1 November a low-level plume of re-suspended ash was visible on satellite imagery. Read allmer., 22 oct. 2003, 06:00
Volcanic activity at Soufrière Hills remained at low levels during 17-24 October. The lava dome was visible on 23 October when a volume survey was carried out. The small lava dome that extruded in July had not grown further, appearing to be stagnant with alteration and degradation causing it to break apart. Read allmer., 15 oct. 2003, 06:00
Activity at Soufrière Hills during 10-17 October remained at low levels. Seismicity indicated that 12 rockfalls occurred as well as nine hybrid earthquakes. Lahars were also noted during periods of heavy rainfall. Read allmer., 8 oct. 2003, 06:00
Volcanic activity at Soufrière Hills during 3-10 October was at a lower level than during the previous week. A period of low-amplitude tremor was recorded during 3-8 October that coincided with light ash venting. No direct views of the summit were possible due to poor visibility. Read allMontrer plus
mer., 1 oct. 2003, 06:00
Volcanic activity at Soufrière Hills during 26 September to 3 October was slightly higher than during the previous week. During 30 September to 1 October, tremor coincided with vigorous ash venting that produced clouds to between 2 and 2.5 km a.s.l. The ash clouds drifted W over the town of Plymouth. Read allmer., 24 sept. 2003, 06:00
Volcanic activity at Soufrière Hills remained at low levels during 19-26 September. Sulfur-dioxide emission rates were slightly lower than the previous week, ranging between 500 and 600 tons per day. According to the Washington VAAC, MVO reported that ash emissions on 30 September rose to a height of ~2.4 km a.s.l. and drifted W. Read allmer., 17 sept. 2003, 06:00
Volcanic activity at Soufrière Hills remained at low levels during 5-12 September. No new lava-dome growth occurred, although there were several ash-venting episodes that were accompanied by a few small earthquakes. Sulfur-dioxide emission rates were relatively low during the report week. Read allmer., 10 sept. 2003, 06:00
Volcanic activity at Soufrière Hills remained at low levels during 5-12 September. No new lava-dome growth occurred, although there were several ash-venting episodes that were accompanied by a few small earthquakes. Sulfur-dioxide emission rates were relatively low during the report week. Read allmer., 3 sept. 2003, 06:00
Activity at Soufrière Hills remained at low levels during 29 August to 5 September. No growth occurred at the new lava dome. During the later part of the week gas emission rates could not be measured because the plume was blown out of reach of the spectrometer in unusual wind directions caused by Hurricane Fabian. Read allmer., 27 août 2003, 06:00
Activity at Soufrière Hills remained at low levels during 22-29 August. No changes or growth occurred at the lava dome. Small changes occurred in the 12 July collapse scar, with new fumaroles opening to the SE of the main explosion crater towards the upper Tar River Valley. Read allmer., 20 août 2003, 06:00
Volcanic and seismic activity at Soufrière Hills remained at relatively low levels during 15-22 August. Views of the lava dome inside the explosion crater showed that no further growth had occurred. Some very small rockfalls were produced from the interior of the 12 July collapse scar, and in several places large fumaroles formed. Read allmer., 13 août 2003, 06:00
Volcanic activity at Soufrière Hills was at low levels during 8-15 August. Views of the new lava dome indicated that no further growth had taken place; it remained a small lobe over 100 m across. Several small slumps occurred from the interior wall of the 12 July scar, producing rockfalls and a small amount of ash in the plume. Read allmer., 6 août 2003, 06:00
During 25 July to 1 August, volcanic activity at Soufrière Hills was low, with only a few seismic events triggering the network. Activity increased at the end of the report week, on 1 August, with episodes of powerful ash venting from the explosion crater. There were many strong bursts of gas and jets of ash; an ash plume rose to over 3 km. Read allmer., 30 juil. 2003, 06:00
As of 1 August, ash emissions were continuing from Soufrière Hills. Low-level ash clouds were visible on satellite imagery. Read allMontrer plus
mer., 23 juil. 2003, 06:00
During 18-25 July, volcanic and seismic activity at Soufrière Hills were at very low levels, with only a few events triggering the seismic network. The pattern of earthquakes during the week indicated that lava-dome growth within the explosion crater had probably restarted, although this could not be confirmed because Soufrière Hills was obscured by low-level meteorological clouds. Sulfur-dioxide flux declined somewhat in comparison to the previous week. Read allmer., 16 juil. 2003, 06:00
After a lava-dome collapse at Soufrière Hills on 12 July volcanic activity was at relatively high levels until 13 July when it slowly subsided. On the 13th activity had declined to very low levels, then the following morning a sudden vulcanian explosion occurred at the lava dome. Two more explosions occurred during the next 2 days. Read allmer., 9 juil. 2003, 06:00
High levels of pyroclastic-flow activity began at Soufriere Hills on 12 July. A hybrid earthquake swarm that began on 9 July merged at 0700 on 12 July into a continuous tremor signal. Prolonged and heavy rainfall occurred on the 12th during 0600-0900, causing mudflows into the Belham Valley. Read allmer., 2 juil. 2003, 06:00
During 27 June- 4 July, activity at Soufrière Hills increased in comparison to the previous week. Pyroclastic flows and rockfalls mainly traveled down the lava dome's N flank, mostly into Tuitt's Ghaut and to a lesser extent into Tyre's and White's ghauts. Sporadic pyroclastic flows also traveled W to the Gages area. Read all
