2011 June 1, western solar limb
With six active regions, I had planned on tackling the solar disk, but the western limb caught my eye with an eruptive prominence, or what I suspect was actually a solar flare.
With little time to spare because of having to get ready for work, I’ll have to look into it later.
Here’s an unprocessed photograph of the sketch sequence.
PCW Memorial Observatory - Erika Rix 