What I was looking at was on the edge ('limb"?) and was perhaps a few percent of the diameter of the disc. Whether that was what my companions were referring to is anyone's guess; they may have spotted flares too. But I thought the prominences (?) did change in size.
Coronal mass ejections CME's can vary from ~ 20 km/sec to ~ 3000 km/secI was surprised at the apparent speed if you translate it to many thousands of km/hr.
I mean, when you think of the time that stuff ejected by the Sun takes to get here then it doesn't seem to scale with the apparent distances / heights of the features I was seeing. I have obviously got something wrong in my intuition about this.
I suppose that the visual images will be not very stunning through any useful narrow band filter. Monochrome or false colour with the right exposure can do wonders - as it does for nebulae.
I agree. I too doubt it was the possible flare candidate B7.2 that started at 11:45 and ended at 11:51 (UTC) ...Yup, definitely prominences, not flares.
Obvious when you think about it.most solar scopes produce a reddish colour for the sun, after all we are viewing down in the red end of the spectrum .... 656.28 nm