Montserrat Volcano Observatory

Daily Report
Report for the period 5 p.m. 8 July
to 5 p.m. 9 July 1998

There was a pyroclastic flow just after 11 o'clock last night. This lasted approximately 4 minutes and went down the Tar River Valley as far as the delta. Two hours before the flow there were two hybrid earthquakes - the first to be recorded in some time. Over the rest of the 24 hour period 10 rockfall signals and 7 volcano-tectonic earthquakes were recorded.

Further COSPEC measurements were carried out today from the MV Shamrock II. An average of three runs produced a figure of 2500 tonnes/day of sulphur dioxide. This flux is high compared to previous figures but may be associated with the collapse last night. Further measurements are required to see if the flux decreases over the next few days.

Ash levels today were low at all sites today.

Residents should continue listening to Radio Montserrat in case there are more sudden developments in the state of the volcano.

Montserrat Volcano Observatory