Soufriere Hills volcano, Montserrat, West Indies (UK): news & activity updates
Mise à jour: 23 mai 2022 17:06 GMT - Refresh
mer., 25 juil. 2001, 06:00
On 29 July ash from Soufrière Hills drifted W, leaving deposits as far away as San Juan, Puerto Rico, 450 km to the WNW. The Washington VAAC issued an advisory on 27 July stating that a steady stream of ash was emitted from the volcano through the evening, rising to 800 m. There was also a persistent, strong hot spot over the volcano's summit visible in satellite imagery. Read allmer., 18 juil. 2001, 06:00
The number of rockfalls increased (719) during 13-20 July in comparison to the previous week (297), although most of them were very small. Near-continuous rockfalls occurred on the S side of the lava dome, where dome growth was concentrated. Numerous pyroclastic flows originated from the S flank of the dome and moved eastward down the Tar River Valley. Read allMontrer plus
mer., 11 juil. 2001, 06:00
During 6 to 13 July volcanic activity at Soufrière Hills remained similar to the previous week. Lava dome growth appeared to still be concentrated on the S side of the dome where near-continuous rockfalls occurred. According to the Washington VAAC, the rockfalls produced ash plumes that did not rise above 3 km a.s.l. and drifted to the W or WNW. Read allmer., 4 juil. 2001, 06:00
During 29 June to 6 July volcanic activity at Soufrière Hills remained similar to the previous week. Lava dome growth appeared to still be concentrated on the S side of the dome above the White River. On 30 June a large number of rockfalls traveled down the N side of the talus apron in the Tar River. Read allmer., 20 juin 2001, 06:00
During 15-22 June volcanic activity remained at about the same level as the previous week. The number of rockfalls increased in comparison to the previous week, while other types of seismic events generally decreased. Towards the end of the week the number of rockfalls also decreased slightly. Read allmer., 13 juin 2001, 06:00
From 12 June to at least 15 June volcanic activity increased at Soufrière Hills in comparison to the previous week. There was a larger number of rockfalls, and hybrid and long-period earthquakes. Sulfur dioxide flux markedly increased (770 metric tons on 11 June and 1410 metric tons on 14 June). Read allmer., 6 juin 2001, 06:00
Earthquake activity decreased through the week of 1-8 June. Good views of the lava dome were hampered by clouds, but observations of rockfall activity confirmed that the main growth area was still concentrated in the southern sector of the dome. Sulfur dioxide fluxes were higher on 4 June than 1 June, with an average daily flux of 320 tons per day, compared to only 130 tons per day on 1 June. Read allmer., 30 mai 2001, 06:00
MVO reported that during 25 May-1 June volcanic activity remained at high levels. There was a significant increase in long-period earthquakes, although most were small. MVO personnel observed an area of new growth in the S sector of the lava dome. Read allmer., 23 mai 2001, 06:00
MVO reported that during 18-25 May volcanic activity increased in comparison to the previous week. The main increase in activity occurred during 19 to 21 May when many large long-period and hybrid earthquakes were recorded. Low-level convective ash clouds generated during this increase in activity rose less than 2 km a.s.l. Read allmer., 16 mai 2001, 06:00
MVO reported that during 11-18 May volcanic activity increased, with about twice the number of rockfalls than the previous week. Most of the rockfalls were small and were observed to the SW of the summit, N of the town of Galway's. Growth of the lava dome was concentrated in the S sector of the volcano above White River. Read allMontrer plus
mer., 9 mai 2001, 06:00
MVO reported that during 4-11 May volcanic activity increased slightly, with more rockfalls and seismic activity recorded than the previous week and a small pyroclastic flow on 9 May. The pyroclastic flow traveled ~2.5 km S of the dome down the White River. There still appeared to be a very small amount of growth in the S side of the lava dome, and observation flights confirmed that most rockfall activity occurred in the dome's S sector. Read allmer., 2 mai 2001, 06:00
MVO reported that during 27 April- 4 May volcanic activity at Soufrière Hills remained low, although there was a slight increase during 28 and 29 April. An increase in rockfall activity occurred from 28 April to 1 May; there were 16 rockfalls on 29 April, 34 on 30 April, and 15 on 1 May. For the previous six weeks there had usually been less than 10 rockfalls per day. Read allmer., 25 avril 2001, 06:00
MVO reported that during 20-27 April volcanic activity at Soufrière Hills remained low, with few rockfalls and little seismicity. A very small amount of growth occurred on the S side of the lava dome, which was accompanied by occasional ash venting. Sulfur dioxide flux also remained low. Read allmer., 18 avril 2001, 06:00
MVO reported that during 13-20 April volcanic activity at Soufrière Hills remained low, with few rockfalls and little seismicity. A swarm of hybrid earthquakes occurred primarily during 0419 to 0741 on 20 April. A very small amount of growth occurred on the S side of the lava dome, which was accompanied by occasional ash venting. Read allmer., 11 avril 2001, 06:00
MVO reported that during 6-13 April volcanic activity at Soufrière Hills remained low. Seismic and rockfall activity were low and there was a small amount of growth on the S side of the lava dome. Sulfur dioxide flux also remained low. Read allmer., 4 avril 2001, 06:00
The MVO reported that during 30 March- 6 April volcanic activity at Soufrière Hills remained low. Like last week, seismic and rockfall activity were low and there was a small amount of growth in the S of the lava dome. Sulpher dioxide fluxes also remained low. Read allmer., 28 mars 2001, 06:00
The MVO reported that during 23-30 March volcanic activity at Soufriere Hills volcano was extremely low. Seismic and rockfall activity were low and there was a small amount of growth in the S of the lava dome. The MVO warned that though activity is low, dangerous conditions can develop quickly and in the event of heavy rain the Belham Valley to the NE of the volcano should be avoided due to the possibility of mudflows. Read allmer., 21 mars 2001, 06:00
The MVO reported that during 16-23 March activity at Soufrière Hills remained at low levels. Most of the 84 detected rockfalls were small events and occurred on the eastern and southern faces of the lava dome. There has been a small amount of growth in the south part of the dome. Read allmer., 14 mars 2001, 06:00
The MVO reported that during 9-16 March activity decreased at Soufrière Hills volcano in comparison to the previous week, with the lava dome continuing to steadily grow. Seismic activity significantly decreased relative to the previous few weeks. Observations confirmed that most rockfall activity occurred to the S down the White River, with occasional rockfalls towards the E down Tar River Valley. Read allmer., 7 mars 2001, 06:00
The MVO reported that during 2-9 March activity decreased at Soufrière Hills volcano in comparison to the previous week, with the lava dome returning to a steady growth rate. Early in the report week the banded tremor recorded the previous week died away, as did the associated hybrid earthquakes. Rockfall activity increased during the middle of the week, returning to more usual levels. Read allMontrer plus
mer., 28 févr. 2001, 06:00
The MVO reported that during 23 February to 2 March activity at the Soufrière Hills volcano increased with a marked change in the character of the seismicity, a change in the direction of lava dome growth, and moderate levels of pyroclastic flow activity. An unusually large number of hybrid earthquakes (388) were recorded during the week. On 24 February dome growth was concentrated on the NE side of the lava dome, but the next day the area of growth changed to the S side of the dome. Read allSoufriere Hills volcano (Montserrat) - Report for 21 February-27 February 2001 (Continuing Activity)
mer., 21 févr. 2001, 06:00
The MVO reported that during 16 to 23 February activity at the Soufrière Hills volcano was similar to the previous week, as lava dome growth continued. The level of seismic activity was also comparable to last week. A large stubby spine was visible in the S part of the summit area on 22 February. Read allSoufriere Hills volcano (Montserrat) - Report for 14 February-20 February 2001 (Continuing Activity)
mer., 14 févr. 2001, 06:00
The MVO reported that during 9 to 16 February activity at the Soufrière Hills volcano fluctuated markedly, as lava dome growth continued. The level of seismic activity varied considerably, with a pronounced peak in activity during 10 and 11 February, which was followed by a gradual decrease in rockfall activity. Observations revealed that the two large spines that were visible on the volcano's summit the previous week had collapsed, and a large lobe had formed on the eastern face of the dome above Tar River. Read allmer., 7 févr. 2001, 06:00
The MVO reported that during 2 to 9 February activity at the Soufrière Hills volcano was slightly higher than during the previous week as lava dome growth continued. Seismic activity remained similar to the previous week, although it increased towards the end of the report week. Rockfall activity was low during the beginning of the week, but significantly increased beginning on 6 February; only 9 rockfalls were recorded on 5 February, while 70 were recorded on 6 February. Read all
