Montserrat Volcano Observatory


Morning Report
Report for the period 16:00 16 April
to 07:00 17 April 1997
The current alert level is ORANGE


Activity overnight continued at a similar low level to that of yesterday. Small to moderate sized rockfalls and pyroclastic flows have been the dominant form of seismic signal recorded by the network overnight. The largest of these signals during the current reporting period occurred at around 5:20 am this morning. Ash clouds generated by these events were blown to the west and north-west by the prevailing winds. Earthquake activity has been generally low with only some long-period earthquakes being detected by the network.

Visibility is currently being hampered by low cloud over the crater. Bramble Airport control tower report that cloud is very low on the eastern side of the volcano and that views are poor.

Despite the apparent low level of activity, the volcano remains in an unstable state, with further dome growth in the southern region above the Galway's Wall. Another dome collapse with extensive pyroclastic flows in the White River is expected within the next week. Residents of Montserrat should remain alert, and listen to Radio Montserrat for further updates. Ash masks should be worn in ashy environments. Visits to zone C should be restricted to those that are essential. All of Zone A, which includes Long Ground and St Patrick's, is very dangerous and should not be entered under any circumstances.


Montserrat Volcano Observatory