Several attempts to delineate the southern zone of maximum frequency of visibility of auroras have led to widely discrepant results. That of White and Geddes (1939) suffered through lack of observations; that of Vestine and Snyder (1945) was based on observed relations between morphology of geomagnetic disturbance and auroras in the northern hemisphere, and application to the southern hemisphere using very limited geomagnetic data. It may be, too, that the distribution of auroras changes slowly with solar activity.