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Volcanoes in the Carribean: news & activity updates
Freitag, Apr 06, 2012
 The new vent at Soufrière Hills volcano (Greg Scott, Caribbean Helicopters)
The Montserrat Volcano Observatory reports that a new vent has been observed in the location where ash venting occurred on 23 March 2012. The vent is located in the floor of the 11 February 2010 collapse scar, immediately south of the remnants of the old English’s Crater wall and southwest of the long-lived hottest fumarole previously identified. It is estimated that the vent is between 30 and 50 m across. ...mehrNo further ash venting has occurred since 23 March. [ less] [ alles lesen]
Montag, Apr 02, 2012
The Montserrat Volcano Observatory reports a significant decrease in the activity of Soufrière Hills volcano. ...mehrNo more phreatic explosions and ash-venting episodes have been observed since 23 March. Seismic activity has returned to a low level as well and zone C on the island was reopened for day-time visits. However, the volcano shows strong sulfur dioxide emission, suggesting that fresh magma might be flowing into a shallow reservoir. During 24-26 March, extremely high levels of SO2 emission rates were measured, up to 4,594 tonnes per day, the third highest value measured in 10 years. [ less] [ alles lesen]
Freitag, Mär 23, 2012
 Ash venting at Soufriere Hills volcano on 23 March (Photo: MVO)
Neue Ascheeruptionen fanden am Vulkan Soufriere Hills auf der Insel Montserrat statt. Die Tätigkeit ist phreatischen Ursprungs und wurde vermutlich durch auftseigendes Magma unter dem Lavadom verursacht. ...mehrDie Ascheauswürfe begannen etwa 8:00 lokaler Zeit am 23 März. Sie wurden von Schwarmbeben am 22. und 23. März begleitet, wie das Vulkanobservatorium MVO berichtete. Die Ausbruchstzentren der neuen Tätigkeit befanden sich im Einbruchstal vom 11 Februar 2010, ganz nahe am Kraterrand des old English craters und westlich der langlebigen und heißesten Fumarole, die davor entdeckt wurde. Die Tätigkeit heißer Gase stieg deutlich an und eine neue Dampf-Fumarole wurde am nordwestlichen Hang hinter dem Ganges Mountain entdeckt. [ less] [ alles lesen]
Mittwoch, Mär 14, 2012
Ein kleiner Pyroklastischer Strom erfolgte von Montserrat der Vulkan Soufrière Hills am 9. März MVO berichtet. Die Strömung war klein, aber ohne Vorwarnung auf um 20 Uhr (Ortszeit) von den westlichen Flanken der Vulkan Soufriere Hills unten in Frühjahr Ghaut. ...mehrThe pyroclastic flow traveled about 1 km to the west towards Plymouth before its ash dissipated to form a small ash cloud rising 1.3 km and drifting towards St. Georges Hill and out to sea. MVO has published further details and photographs of this event which is significant as it occurred during a quiet phase of the volcano with no current active lava dome growth and illustrates the hazard of sudden pyroclastic flows. "There were no precursors to this event. Although activity has generally been low, this event clearly illustrates that Soufrière Hills Volcano is still an active volcano and that pyroclastic flows can occur at any time with little to no warning." [ less] [ alles lesen]
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