[en] According to an agreement with the Swedish Nuclear Fuel and Waste Management Company (SKB) and Uppsala University, the Department of Earth Sciences has continued to carry out observation and additional construction of new seismic stations within the Swedish National Seismic Network (SNSN). This short report gives brief information about the recorded seismicity during October through December 2011. The Swedish National Seismic Network now consists of 65 stations. During October through December, 2,682 events were located whereof 165 are estimated as real earthquakes, 1,628 are estimated as explosions, 660 are induced earthquakes in the vicinity of the mines in Kiruna and Malmberget and 229 events are still considered as uncertain but these are most likely explosions and are mainly located outside the network. Seven earthquakes had magnitudes above M_L = 2.0 during the period. In October two earthquakes had magnitudes above M_L = 2.0. One with magnitude M_L = 2.2 was located 24 km SE of Nikkaluokta and one earthquake with magnitude M_L = 2.1 was located 28 km SW of Ludvika. In November an earthquake with magnitude M_L = 2.2 was located 55 km north of Oevertorneaa and one with magnitude M_L = 2.0 was located 6 km east of Grantraesk and 101 km NW of Umeaa. In December three earthquakes had magnitudes above M_L = 2.0. One had a magnitude of M_L = 2.8 and was located 22 km NW of Robertsfors and one earthquake with a magnitude of M_L = 2.4 was located 25 km north of Robertsfors. One earthquake with magnitude M_L = 2.2 was located 8 km west of Hudiksvall