Here is a detail of the region I was interested in:
The story does not end there. I took the image at about 14:00 EST on Oct 14. That's 16:00 UT, I think. A few hours later, the LASCO C3 imager on SOHO recorded what looks like a small coronal mass ejection coming from what appears to be the same region of the sun! In this image, the white circle at the center is the position of the visible photosphere, representing the diameter of the sun. The C3 "coronagraph" is capable of seeing coronal mass ejections, because it is looking at a UV wavelength where the details of the high temperature particles can be seen.
So, I think it adds substantiation that this detail which looks like a prominence looped over a large region of the sun, is in fact really being picked up by the equipment.