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.
