Some auroral observations inside the southern auroral zone

Observations of the Australian National Antarctic Research Expedition at Wilkes in 1959 indicate two features of auroral behavior similar to that observed at other stations on the poleward side of the isoaurore of maximum frequency: (1) diurnal variation of overhead occurrence exhibits evening and morning maxima, and (2) homogeneous auroras tend to be aligned in the sun-earth line. The observations do not indicate the existence of an inner auroral zone within the field of view of Wilkes station. Directions of transverse movement of auroras tend to be westward, but velocities are not accounted for by a simple orientation-fixed model.