Originally posted by ChronicLeaky
I also prefer your type of corona to mine, although, truth be told, the Wikipedia "corona" disambiguation page is full of interesting things.
Quite. And of course the one you get first when you search for "corona" isn't bad at all either - a beautiful thing to behold when you watch a total solar eclipse. However, in terms of nordlys activity it's the coronal holes that are most interesting. Maybe I should take a bit of the solar corona to freeze and eat it, thus creating a coronal hole that in turn will result in some nice nordlys activity.