The Australian Space Forecast Centre issued a Geomagnetic Disturbance Warning on December 29 at 0010 UTC.
“A recurrent equatorial coronal hole will soon reach geoeffective location on the solar disk. The size of the current coronal hole is relatively larger compared to its characteristics during the previous rotation. The co-rotating interaction region and subsequent high speed streams associated with the coronal hole is expected to affect Earth from late 30 December. Auroras may be visible on the local nights of 30 and 31 December in Tasmania and possibly from the coastline of Victoria.”
The warning said to expect active geomagnetic conditions on December 30 and 31.
The past two and a half weeks have seen seven days with zero sunspots, spread over four periods of one to three days each.