Montserrat Volcano Observatory

Morning Report
Report for the period 6 pm 8 November
to 7 am 9 November 1997

During the reporting period the level of seismic activity has again been high.

Tremor and hybrid earthquakes have again dominated the activity. Discrete hybrid earthquakes began at 4.30pm yesterday afternoon following a period of tremor and occurred at a rate of about 2 per minute until 11.30pm. From this time tremor dominated the signal until 3:10 when there was a small pyroclastic flow, probably in the Galways area. Following the flow, the amplitude of the tremor decreased and small hybrid earthquakes were again dominant. The swarm of hybrid earthquakes is continuing and will probably eventually culminate in a series of pyroclastic flows.

The high level of seismicity at the moment means there is a high possibility of more pyroclastic flows, which could travel down Ghauts on any flank of the volcano. A substantial dome collapse could also initiate further explosions. If these explosions do occur, they may do so with little or no warning. Friths, Old Towne and Salem are not safe places to live.

In the event of an explosion or ashfall residents are reminded that they should not attempt to drive, but should get indoors and remain under the shelter of a strong roof. Residents are reminded that they should carry dust masks at all times and use them whenever there has been an ashfall. Everyone is advised to remain alert and keep listening to Radio Montserrat for any new information.

Montserrat Volcano Observatory