Montserrat Volcano Observatory

Daily Report
Report for the period 16:00 on 17 November
to 16:00 on 18 November 1995

Twelve (12) earthquakes have been located during this period. Almost all of the events were located beneath the Soufriere Hills Volcano, in the depth range 0-4 km (i.e within 2.5 miles below the surface). Although the quantity of located earthquakes has continued to decrease following the peak period of Nov 14-15 numerous weaker events are still occurring. These are only being detected by the Gages station which is 1.5 km ( 1 mile) from the crater. Some episodes of light ashfall were reported in Amersham.

Tar River, Galway and O'Garra EDM lines were measured today. All the lines showed essentially no change from their previous measurements.

The GPS (Global Positioning System) survey that was done at Chance's Peak yesterday shows about 13 cm (five inches) of swelling at that location over a period of 36 days. This result is consistent with the EDM measurements to date. These observations combined with the measurements along the Tar River - St. George's Hill - Reid's Hill suggest that the deformation is localized in the English's Crater and that the source of the deformation is shallower than 5 km.

Observations of English's Crater were made today from Chance's Peak. Apart from occasional landslides which are occurring at the edge of the July 18th vent no major changes were observed.

Scientists shall continue to maintain the same level of vigilance in monitoring.

Montserrat Volcano Observatory