The level of seismic activity during the night has remained almost the same as during the day time. The seismicity continues to be dominated by the occurrence of small, hybrid earthquakes at shallow depths beneath the volcano at a rate of about 3 to 5 per minute. However, the amplitudes of these events have generally been smaller.
Several rockfalls were also recorded, with the most notable sequence of rockfalls starting at about 20:37 on 13 April and lasting for about 20 minutes.
Visibility during the very early morning from both the Observatory and Bramble Airport was poor.
The scientists at the MVO remain gravely concerned about the current level of activity at the Soufriere Hills volcano and therefore urge people still living in the evacuated zone to leave immediately. Visits to the evacuated zone should be restricted to those that are absolutely essential. The Tar River, Long Ground and Whites areas are now extremely dangerous, and should not be entered under any circumstances.