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Last Updated: Jun 30th, 2008 - 11:52:26 |
Montserrat Volcano Observatory
Report for the period 21 June to 27 June, 2008
Activity at the Soufriere Hills Volcano remained low over the past week.
Sporadic heavy rainfalls during the week triggered some minor mudflows down the Belham river.
The pause in dome growth continues and seismic activity remains low. This week, the MVO recorded 6 rockfalls, 2 long period and 4 volcano-tectonic events. The average sulphur dioxide (SO2) flux for the week was 323 tons per day (t/d) with a minimum of 256 t/d on June 26 and a maximum of 472 on June 23.
Erosion of the dome talus continues on the Tar River (E) side on a regular basis, producing minor rockfalls.
The activity over the past few weeks shows continuing unrest at the volcano. Even if lava extrusion does not restart, the dome is still a very large mass of very hot material which is capable of collapsing or exploding at any time. Lahar activity in river valleys around the volcano is a potential hazard during and after periods of heavy rainfall.
The alert level remains at 4.
Access to all areas on the southern flanks of the Belham Valley except Isles Bay Hill and the east of the Belham Bridge, is prohibited as is south of Jack Boy Hill to Bramble airport and beyond. The Maritime Exclusion Zone around the southern part of the island extends 4 km off shore from Spanish Point to Roches Yard on the east side of the volcano, 2 km offshore from O’Garra’s to Sturge Park on the south west.
Additional information on the Soufrière Hills Volcano, including the risk map, can be found at the MVO website: http://www.mvo.ms.
Dr Nicolas Fournier
Acting Director, Montserrat Volcano Observatory
Montserrat Volcano Observatory
Flemmings
Salem
Montserrat
Tel: 1-664-491-5647
FAX: 1-664-491-2423
e-mail: nico@mvo.ms
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