The UWI SRC in its latest update says seismic activity at La Soufrière, St Vincent has remained low since the tremor associated with the explosion and ash venting on 22 April.
In the last 24 hours, seismic activity was limited to a few long-period, hybrid and volcano-tectonic earthquakes. When the cloud is high enough, there is persistent steaming observable from the observatory.
Thermal anomalies indicating high temperatures inside the new crater continue to be detected by the NASA FIRMS alert system. These have been persistent since the 22 April explosion, the UWI SRC says.
Gas measurements on May 18 yielded an average SO2 flux of 633 tons per day. The volcano continues to be in a state of unrest. Escalation in activity can take place with little or no warning.
The SRC says caution should be taken in crossing river valleys on the volcano due to the increased risk of lahars (mudflows) during periods of rainfall on the volcano.
The volcano is at alert level ORANGE.