Montserrat Volcano Observatory

Daily Report
Report for the period 16:00 10 November
to 16:00 11 November 1996
The current alert level is ORANGE.

Activity at the volcano has been at a high level during the past 24 hours with a continuation of the swarm of VT earthquakes which began two days ago. The crater has been overcast for most of the day and no clear views were obtained.

The swarm of shallow volcano-tectonic earthquakes which began at 17:50 on 09 November continued during the reporting period. The activity peaked at about 10 events per hour at 23:00 on 10 November. Activity has declined since then and there were between one and four earthquakes per hour at the end of the reporting period. One hundred and eight earthquakes were recorded during the period with activity less intense than that experienced during the swarms on 1-2 November and 4-6 November. The VTs recorded today have been more numerous but smaller, with few large enough to be located. Two regional earthquakes and one small rockfall signal were also recorded by the seismograph network.

The viewing conditions at the volcano were very poor for the entire day and no views were obtained of the crater.

No EDM or GPS measurements were carried out today.

The average value of SO2 flux from the volcano measured using the COSPEC was about 227 tonnes per day. This is similar to levels measured over the last few days.

The MVO scientists are concerned about the VT swarms which have been experienced during the past week. There is a possibility of a rapid escalation of volcanic activity during the next few days and all residents are urged to always remain alert. The volcano is in a very dangerous state and all residents should follow the recommendations laid out in the alert procedures and listen to Radio Montserrat.

Montserrat Volcano Observatory