The diurnal variation in magnetic and auroral activity at three high‐latitude stations

The data used in this article were prepared for the purpose of comparing magnetic and auroral diurnal‐activity. Hourly magnetic character‐figures on a scale of 0, 1, and 2 are used to express magnetic character. As J. M. Stagg1 has found that such figures express satisfactorily the diurnal variation in irregular magnetic disturbance in high latitudes, the magnetic character‐graphs for the three high‐latitude stations considered in this article serve also to compare with the results of Stagg's investigation for ten other high‐latitude stations. The data used are for the following stations: The Byrd Antarctic Expedition Station at Little America, Antarctica, 1929–30; The United States Polar‐Year Station at Barrow, Alaska, 1932–33; and the Canadian Polar‐Year Station at Chesterfield, Northwest Territory, Canada, 1932–33.