Arctic Circle level, although in mountainous regions there is often no direct view of the true horizon. Only four million people live north of the Arctic Circle due to the severe climate; nonetheless, some areas have been settled for thousands of years by indigenous peoples, who today make up 10% of the region's population. Tens of thousands of years ago, waves of people migrated from eastern Siberia across the Bering Strait into North America to settle. The largest communities north of the Arctic Circle are situated in Russia, Norway and Sweden: Murmansk (population 307,257), Norilsk (175,365), Tromsø (71,295), Vorkuta (59,231) and Kiruna
Far North (Russia) Federation. In January 2007, the State Duma Committee for Issues of the North and Far East approved a proposed law defining regions within the Far North which would determine the extent of compensation for workers. The regions were established based on general climate, with harsher regions garnering greater compensation relative to milder regions. Far North (Russia) The Extreme North or Far North () is a large part of Russia located mainly north of the Arctic Circle and boasting enormous mineral and natural resources. Its total area is about , comprising about one-third of Russia's total area. Formally, the regions of