Montserrat Volcano Observatory

Daily Report
Report for the period 6 pm 16 January
to 6 pm 17 January 1998

Seismic activity at the volcano today has again been low. Between 16:00 yesterday and 16:00 today there were 13 hybrid earthquakes, 17 rockfall signals and 3 long-period earthquakes. No volcano-tectonic earthquakes were recorded. There is some cylicity showing again in the seismicity, with RSAM peaks every 16 to 20 hours at the moment.

Visibility has again been poor today. Minor rockfall activity was noted in the White River valley, adding material to the talus slope beneath the growing dome.

A survey of the deposits in the upper part of the White River valley was undertaken today. This will help to constrain the volume of the collapse on Boxing Day. The results of the survey are still being processed.

A GPS survey was also undertaken today between Tar River and Harris. The results of this survey should be available tomorrow.

Dust levels at all of the monitoring stations across the island were low today.

Prof. Barry Voight of Penn State University left island today after a 10-day visit to assist in the assessment of the Boxing Day collapse.

People should remain alert and listen to Radio Montserrat for further information.

Montserrat Volcano Observatory