Montserrat Volcano Observatory

Daily Report
Report for the period 6 p.m. 19 May
to 6 p.m. 20 May 1998

The level of volcanic activity has been low today. Between 4 p.m. yesterday and 4 p.m. today, 7 volcano-tectonic earthquakes and 6 rockfalls were recorded by the seismograph networks.

The volcano was covered with cloud. A small pyroclastic flow occurred during the night and probably travelled down the Tar River. It produced a smaller seismic signal than the flow yesterday afternoon, but once again this emphasises that the dome is still very unstable and that flows can occur can occur down all flanks with little or no warning.

Dust levels were raised today at all sites except at the MVO in Mongo Hill. These levels are probably a result of the dry conditions over the two weeks. A pale blue haze could be seen over Chances Peak and Gages Mountain, which is an indication of sulphur dioxide being emitted from the volcano.

Work continued today on the new GPS site at Spring Estate on the west flank of the volcano.

Residents are reminded that the volcano remains in a potentially active state, and that they should continue listening to Radio Montserrat in case the present quiet situation at the volcano changes suddenly.

Montserrat Volcano Observatory