Swedish National Seismic Network (SNSN). A short report on recorded earthquakes during the fourth quarter of the year 2010

According to an agreement with Swedish Nuclear Fuel and Waste Management Company (SKB) and Uppsala Univ., the Dept. of Earth Sciences has continued to carry out observations of seismic events at seismic stations within the Swedish National Seismic Network (SNSN). This short report gives brief information about the recorded seismicity during October through December 2010. The Swedish National Seismic Network consists of 62 stations. During October through December, 2,241 events were located whereof 158 are estimated as real earthquakes, 1,457 are estimated as explosions, 444 are induced earthquakes in the vicinity of the mines in Kiruna and Malmberget and 182 events are still considered as uncertain but these are most likely explosions and are mainly located outside the network. One earthquake had a magnitude above ML = 2.0 during the period. In November one earthquake was located 13 km SW of Haernoesand with a magnitude of ML = 2.1. The largest earthquake in October had a magnitude of ML = 1.7 and was located 12 km NE of Eksjoe and in December an earthquake with a magnitude of ML = 1.8 was located 19 km north of Motala.