52 years ago the southern skyline of Canberra was host to a display of the aurora australis or southern lights. The phenomena is caused by solar flare activity on the sun and displays as colored waves of light in the southern sky. The article indicates that the event happened after a significant rain event which produced 3-4 inches (75-100mm) of rain. Somewhat similar to the weather we are experiencing now...
The West Australian - 4 September 1947
National Library of Australia