Monday, May 21, 2012

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

The seismic network recorded two volcano-tectonic earthquakes and one long-period earthquake this week.

The average sulphur dioxide measurement over five days this week was 589 tons per day with a maximum of 1204 and a minimum of 257 tons per day.

During the first half of the week, there was excellent visibility of the dome which showed no changes.

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