According to TheLocal, an earthquake struck northern Sweden on Saturday night between Piteå and Skellefteå, about 45 kilometres off the coast of the Gulf of Bothnia.
The earthquake was measured as 3.9 on the Richter scale, although the European-Mediterranean Seismological Centre (EMSC) measured the quake at 4.2.
According to the Swedish national seismic network, the Gulf of Bothnia "has relatively high seismic activity but has not experienced a quake of this size in the last 100 years."
According to northern Swedish regional newspapers, there were no injuries and only minor damage to property has been reported.
Paul Connolly, The Local's northern Sweden correspondent, who lives in the affected area, said that the earthquake struck at around 9.55pm.