It is unusually large by Swedish standards. Such large earthquakes occur only about every fifth year, says seismologist Björn Lund to Mariestads-Tidningen.
You probably have to go back several years. The last really large quake was in the Bay of Bothnia in 2016 with a magnitude of 4.1. I don't think we've had anything that size since then.
Wednesday's earthquake had a preliminary magnitude of 3.5, but after manual analysis, the magnitude was corrected to 3.3.
According to local media, the earthquake was felt in several places, including Skaraborg and Karlstad.
The quake occurred more precisely 35 kilometers east of Säffle, 45 kilometers south of Karlstad, and 35 kilometers northeast of Mariestad. According to NWT, the quake occurred centrally in Lake Vänern, on the border between Värmland and Västra Götaland counties.
As recently as November last year, an earthquake with a magnitude of 3.0 occurred in Lake Vänern.
The largest earthquake measured in Sweden, which is known with certainty, occurred off the Koster Islands in 1904 with a magnitude of 5.4.
