Librivox: Fur Country, The or Seventy Degrees North Latitude by Verne, Jules

Summary: In 1859, officers of the Hudson's Bay Company are given the mission to found a fort at 70 degrees north of the polar circle. At some point, an earthquake occurs, and from then on, laws of physics seem altered (a total eclipse happens to be only partial; tides are not perceived anymore). They eventually realise that they are not where they are supposed to be. (wikipedia)