Temperature distribution
Ratio of EIT full Sun images in Fe XII 195A to Fe IX/X 171A as recorded on 26 June 1996 between 21:49 and 21:55 UT. This line ratio gives an indication of the temperature distribution in the Sun's corona with dark areas being cooler regions and bright areas being hotter. Note the distinctive difference between the active ("hot") east limb as compared to the quiet ("cool") west limb. The polar coronal holes also show up clearly as "cooler" regions.