Thursday, May 17, 2012

 

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

The seismic network recorded two rockfalls and eight volcano-tectonic (VT) events this week. Four of  these VTs occurred in one minute during the early hours of 1 December.

The average sulphur dioxide measurement over seven days this week was 576 tons per day with a maximum of 657 and a minimum of 365 tons per day.

Partial clear views of the dome showed no fresh rockfall deposits.

Large lahars (mudflows) occurred on the southern and western side of the volcano in the early hours of 27 November.

Despite the low level of activity, pyroclastic flows can still occur 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