Activity at the Soufrière Hills Volcano remains low.
The seismic network recorded one rockfall and 36 volcano-tectonic earthquakes this week. All 36 VTs occurred in a brief, but intense swarm that began at 06:41 (local time) on 27 July.
This is the strongest swarm to have occurred since March 2014.
There were no observable changes in fumarole activity, nor was there any ash venting, following this swarm.
Measurements of the SO2 flux were made using the helicopter on 26 July. A total of nine traverses beneath the plume were carried out, with an average SO2 flux of 355 tonnes per day.
Pyroclastic flows can occur at any time without warning on any side of the volcano, including Gages from where they can travel rapidly into Plymouth. Tracks across the Belham Valley can be destroyed or heavily modified by flash flooding or lahars, and caution should be exercised crossing the valley during and after rainfall.