Seismic activity still strong

26.08.2014 - 23:27
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Intense seismic activity is still being detected at the northern end of the dike intrusion, which is now about 40 km. long. Propagation of the intrusion has slowed however, and according to the Icelandic Met Office, the northern tip has remained static today.

The strongest activity is on a 10 km long part of the intrusion, partly under the margin of the Dyngjujokull outlet glacier. The intrusion now reaches about 8 km north of the glacier, heading north, towards Askja, another caldera north of the area. Earthquakes are mostly at 5-10 km. depth. 

Strong earthquakes are still being detected at the rim of the Bardarbunga caldera, but are still thought to be associated with pressure changes in the magma chamber beneath. The 5,3 Magnitude earthquake there last night is the strongest event measured in Iceland since May 29th 2008, when a 6.3 Magnitude event struck the area near Selfoss, in the southern part of the country. That quake caused considerable damage in the region.

 In recent days, geophysicists and technicians from the IMO and the Earth Science Institute at University of Iceland have been putting up new seismometers and GPS equipment at locations near the Bardarbunga region. Several more will be placed over the next few days. With added equipment, scientists hope to get a fuller picture of the events as they happen, and more precise information to calculate the depth of the earthquakes and land deformation related to the dike intrusion. More precise modelling of the dike intrusion also depends on information gleamed from those detectors. 

 

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