The Geographic Incidence of Aurora and Magnetic Disturbance, Southern Hemisphere

In the present paper average features of geomagnetic disturbance and aurora in south polar regions are compared with those derived on the basis of more extensive data for high northern latitudes. The seasonal and yearly average of the disturbance daily variation (SD) is obtained for various stations in Antarctic regions and its variation in amplitude with latitude compared with that for the Northern Hemisphere. These data are used to estimate the position of the southern zone of maximum auroral frequency and this result compared with available yearly frequencies of aurora. A particular aim of the investigation is the clear indication of present deficiencies in observational data, both magnetic and auroral, and of the regions most in need of additional observations.