Some pretty cool proms today. I have been trying to determine what the proper nomenclature is for the various shapes. There seems to be at least two different classifications ( H Zirin "Astrophysics of the sun" and J Jenkins "Observing the sun").
In the attached picture, the prom at 1 o'clock appears to be a quiescent, descending form (maybe a brusque or haystack) but Jenkins describes something very similar in appearance as a bubble and plume (p.73) which is primarily descending but with focal ascending areas.
The proms at 3 o'clock appear to be active surges.
What to you all think?
Edited by descott12, 18 May 2019 - 09:18 PM.