Seismic activity is ongoing in Bárðarbunga volcano under Vatnajökull glacier, the northern part of the dike intrusion and Herðubreiðartögl. Around 30 earthquakes were measured last night, the largest of which was of magnitude 5.2, according to automatic sensors.
The quake hit at 01:07 am at the northern caldera rim of Bárðarbunga. Tremors remained similar throughout the night and the eruption in Holuhraun continues, as stated in an update from the Icelandic Met Office this morning.
Scientists on yesterday’s surveillance flight of the area concluded that the Bárðarbunga caldera has sunk by 2.5-3.0 meters since it was last measured on Saturday. The depression now measures 18.5 meters (61 feet).
The development increases the likelihood of a sub-glacial eruption, ruv.is reports.