At 01:01 UTC on 18-November-2017 there was a magnitude 3,4 earthquake in western part of the Tjörnes Fracture Zone. A foreshock of magnitude 2,2 occurred at 00:30 UTC. Only this two earthquakes happened at this location north of Siglufjörður village.
The earthquake activity in TFZ during the night. Copyright of this image belongs to Icelandic Met Office.
The larger earthquake was felt in Siglufjörður village.