Arctic Circle (18,148). Rovaniemi (61,329) in Finland is the largest settlement in the immediate vicinity of the Arctic Circle, lying south of the line. In contrast, the largest North American community north of the Arctic Circle, Sisimiut (Greenland), has approximately 5,000 inhabitants. Of the Canadian and American Arctic communities, Utqiagvik, Alaska is the largest settlement with about 4,000 inhabitants. The Arctic Circle is roughly . The area north of the Circle is about and covers roughly 4% of Earth's surface. The Arctic Circle passes through the Arctic Ocean, the Scandinavian Peninsula, North Asia, Northern America and Greenland. The land within the Arctic
Arctic Circle at least once per year (and therefore visible at midnight) and below the horizon for 24 continuous hours at least once per year (and therefore not visible at noon). This is also true in the Antarctic region, south of the equivalent Antarctic Circle. The position of the Arctic Circle is not fixed; as of , it runs north of the Equator. Its latitude depends on the Earth's axial tilt, which fluctuates within a margin of more than 2° over a 41,000-year period, due to tidal forces resulting from the orbit of the Moon. Consequently, the Arctic Circle is currently drifting