Montserrat Volcano Observatory


Morning Report
Report for the period 16:00 04 May
to 07:00 05 May 1997
The current alert level is AMBER


Activity at the volcano has been at a low level overnight. The current pattern continues with the seismic records being dominated by rockfalls and small pyroclastic flows from the active area of the dome. Long-period earthquakes continue to occur at levels which are above background. Some of these events trigger rockfalls from the dome. Overnight, material has been shed from the dome both to the south over the Galway's Wall and to the east into the Tar River Valley.

Cloud is currently obscuring the summit of the volcano and the upper parts of the dome. Most of the northern and north-western area of the dome complex is steaming. Some light ash is also being blown westward as the result of a rockfall from the active part of the dome. Further observations will be made throughout the day.

Whilst dome growth continues at the Soufriere Hills volcano, it remains dangerous. Pyroclastic flows and associated surges could occur at any time and without warning in the Tar River or White River valleys, and these and peripheral areas should not be entered at any time. Rapid changes in the style of activity and areas affected are possible. Visitors to Zone C should thus stay alert and are reminded to stay well clear of ghauts in the event of heavy rain. Masks should be worn in any areas affected by ash.


Montserrat Volcano Observatory