Montserrat Volcano Observatory

Daily Report
Report for the period 6 pm 9 March
to 6 pm 10 March 1998

The level of volcanic activity over the last twenty four hours has remained low.

Between 16.00 yesterday and 16.00 today there were 3 hybrid earthquakes, 2 long period earthquakes and 10 rockfall events. Rockfalls observed during a helicopter flight correlated with the largest recorded events. These occurred down the eastern flank of the volcano and also down the narrow chute on the eastern side of the October 22nd dome. Other small rockfalls were observed down the Galways side, these were too small to trigger on the seismic network.

Visibility of the dome was again excellent today. The prominent spine remains in place. A kinematic GPS survey was undertaken. Additional theodolite measurements were also made from Perches mountain and from the South Soufriere hills. The results, when processed, should provide a new estimate of the volume of the dome.

There were also GPS occupations of the line between Perches mountain and Harris. An additional long occupation of the line between Harris and Long Ground will run overnight.

No dust level measurements are available today as the monitoring equipment was being downloaded.

Residents are reminded to remain alert and listen to ZJB radio.

Montserrat Volcano Observatory