Observationsort Haparanda Hernösand Falun Upsala Stockholm Karlstad Göteborg Visby Karlshamn Vardö Bodö Kristiansund Skudesnäs Oxö ( Krsand Köpenhamn Fanö ( Danm Borkum Hamburg Swinemtinde Neufahrwassor Krefeld Leipzig BreslauArkangel