There were fifteen (15) earthquakes located during the past twenty-four hours. The events were mainly concentrated within the Long Ground-Soufriere Hills area. The earthquakes ranged in depth from 1-5km and were all volcano-tectonic.
There were several episodes of broadband and intermediate-frequency tremor begining at approximately 9:59pm last night and continuing throughout today. The episodes of tremor which occurred were all associated with ashfalls which affected villages along the east coast stretching from Tar River to Brambles Airport. One eruption signal was recorded at 17:32 yesterday afternoon. There were no reported ashfalls from this event.
The EDM site at Tar River was re-occupied today. The measurements made do not show any significant changes from those made on previous occasions. The electronic tilt station at Long Ground continue to show no significant changes.
The helicopter went up at 2pm today for an inspection of the crater. Observations made during this flight revealed that the July 18th crater have extended towards the east and is the vent responsible for the ashfalls experienced along the east coast. A small mudflow was noted to have come down the Tar River.
Mr Desmond Seupersad of the Seismic Research Unit returned to Trinidad today. Mr Seupersad ended a three-week stint with the Soufriere Hills Observatory where he assisted mainly with the processing of seismic events.