As promised, photos of the solar halo over Santiago earlier today. The sun was up at around 52 degrees and in fact there was a faint circumsribed halo around the 22 degree halo. This could only be made out faintly with the naked eye, but with a bit of post-processing is quite detectable on screen.
Anyway, these were my photos from today. First, a shot using a circular polarising filter to bring out the contrast:
and thirdly with some strong post processing, the cicumsribed halo is strongly visible: