The level of seismic activity at the volcano has been very low during the past 24 hours. The visibility has been poor, so no views of the crater area have been possible.
Three volcano-tectonic earthquakes have been recorded, and these were located at shallow depths beneath the crater. One moderate-sized long-period earthquake and two small rockfall signals were also recorded. There was a moderate regional earthquake, of magnitude 5.5, to the northwest of Puerto Rico at 03:20 this morning.
The viewing conditions were poor today. The dome complex to the north east of the October 1 dome is steaming, and emitting small jets of ash intermittently. During a helicopter flight late yesterday afternoon, glowing material was seen on the top and at the northern edge of the October 1 dome.
EDM measurements were completed today on the eastern triangle between Whites, Long Ground and Castle Peak. The measurements show less than a centimeter of change since two days ago.
Despite the current low level of activity, the MVO scientists remain concerned about the possibility of a rapid escalation of volcanic activity during the next few days. Several more days of low activity will be required before we can advise that the alert level can be lowered again. We stress that the volcano is still in a very dangerous state and that all residents should follow the recommendations laid out in the alert procedures, and listen to Radio Montserrat.