Montserrat Volcano Observatory


Morning Update
0800H 09 December, 1995


The level of seismicity continued to decrease throughout the night, with discrete events now occurring at a rate less than one per minute. Background low frequency tremor has completely died out since 18:00 on the 8/12/95, and has been replaced largely by short periods of low amplitude broadband tremor possibly related to steaming at the surface. A regional event was recorded at 23:28 (11:28 pm), last night. This event was located wast of Montserrat and has had no effect on local seismicity.

A mudflow signal was recorded at the Gages seismograph station at 03:34 this morning, the event ended at 04:52. Light to moderate rainfall experienced during the early morning is believed to have caused the mobilization of ash deposits which cover the upper flanks of the volcano and produced this event.

An attempt was made to measure the Long Ground-Castle Peak-White EDM line late yesterday evening. However, low level clouds did not allow a signal to be obtained from the reflector located on Castle Peak. Establishment of a new three-component seismograph station at South Soufriere Hills was also completed late yesterday evening. This new station would assist scientists in obtaining better solutions for the location and depths of earthquakes related to activity at the Soufriere Hills Volcano.


Montserrat Volcano Observatory