Montserrat Volcano Observatory


Daily Report
Report for the period 16:00 on 07 Feb. 1996
to 16:00 on 08 Feb. 1996


The episode of very low seismic activity that began on the evening of 6 February continued throughout the period under review. Occasional, small long-period earthquakes (magnitude less than 1), have been recorded only by the nearest seismometer station (Gages) every few hours or so. Two small volcanic-tectonic earthquakes were recorded only on the nearest seismometer stations to the volcano this afternoon. Other seismic signals, of the type that can often be associated with rockfall or small explosions were also observed. Of these, 30 to 40 were large enough to be recorded on the stations at Hermitage and Long Ground, in addition to the station at Gages. Many more such signals were only large enough to recorded by the Gages seismometer occurring approximately every 10 to 20 minutes. A small regional earthquake 100 - 120 km from Montserrat was recorded on the seismic network on 8 February at 12:02 and had a magnitude about 2.0.

Bad weather conditions throughout the entire day prevented any EDM measurement from being made. No angular measurements to the dome was possible since the crater rim was not visible at any time during the day.

Low cloud cover over the volcano area prevented any visual observations from the helicopter or by scientists on the crater rim. 8 February 1996


Montserrat Volcano Observatory