What is "mosken"

Mosken is a small uninhabited rocky island in the municipality of Værøy in Nordland county, Norway. The island is located in the Lofoten archipelago about halfway between the islands of Værøy to the south and Moskenesøy to the north. The Moskenstraumen maelstrom—one of the most powerful in the world—is located on the north side of Mosken. Historically, the island was used for grazing sheep in both the summer and the winter.