Variations of Intensity of the Aurora at Macquarie Island

Abstract

Observations of intensity of the aurora at Macquarie Island (geomagnetic co· ordinates 61 oS., 243°E.) are examined. The intensity is found to be dependent on geomagnetic planetary disturbance index Kp but the form of this dependence is different for different auroral forms. After eliminating the effects of variation of K p the residual diurnal and annual variations of intensity are small and irregular.