Montserrat Volcano Observatory

Daily Report
Report for the period 16:00 on 29 October
to 16:00 on 30 October 1995

There were fifty-five (55) earthquakes located during the past twenty-four hours. The events were clustered in a region just west of Windy Hill, with some scattered in Centre Hills and the Soufriere Hills volcano region. The events were mainly volcano-tectonic with focal depths in the range 1-7km. Two small long-period events were recorded after an eruption signal at 21:10 on the 29th.

Three eruption signals were recorded at 21:10 and 02:44 on the 29th and 13:10 on the 30th. Ash from the first two events was observed in English's Crater by helicopter. The third event was witnessed by scientists from the Tar River EDM site. This produced a high ash column and resulted in ashfall in Fort Ghaut, Parson's, Webb's, Amersham, Upper Gages and Plymouth. Broadband tremor followed both events.

EDM measurements were made at the Tar River site today. The result for Tar River shows no significant change compared to the value obtained yesterday.

Visual inspection of English's Crater was made by helicopter early today. Low cloud cover hindered observation of the crater area but considerable ash from the 21:10 eruption was noted in the Moat area. This could not be attributed to any of the existing vents due to poor visibility.

Mister Lutchman Pollard from the Seismic Research Unit in Trinidad joined the scientific team on Saturday 28th. Mister Pollard will assist in the seismological aspects of the monitoring.

Montserrat Volcano Observatory