Monday, May 21, 2012

Activity at the Soufrière Hills Volcano remains at a low level.

Three volcano-tectonic earthquakes were recorded by the seismic network this week.

The average sulphur dioxide measurement over seven days this week was 343 tonnes per day with a maximum of 531 and a minimum of 247 tonnes per day.

Clear weather allowed good views of the lava dome on several days this week and no changes were identified. Spots of incandescence on the lava dome, similar to those observed in recent months, were seen at night this week.

A small lahar occurred on the western side of the volcano in the early hours of 27 January.

Pyroclastic flows can still occur at any time without any warning. Lahars (mudflows) also remain a hazard.Tracks across the Belham valley are frequently destroyed or heavily modified by lahars, therefore caution should be exercised crossing the valley during and after rainfall.

The Hazard Level is 2. There is daytime access (8:00 am to 4:00 pm) to Zone C. Maritime zone W remains daytime transit only (boats may sail through the zone but must not stop).

Category: Weekly reports