Panel (A) shows the evolution of the total daily (black) and hemispheric sunspot numbers over the past 22 years (northern hemisphere—red; southern hemisphere—blue) from the Solar Influences Data Center (SIDC) where the epoch studied herein is bracketed by vertical dashed black lines. The profound hemispheric asymmetry of solar cycle 24 is clearly visible. Panel (B) shows the derived CH latitude–time (or “butterfly) diagram, for the 2011–2015 epoch where we have global coverage of the EUV corona. The thick dashed red and blue lines indicate the time of sunspot maxima in the northern and southern hemispheres respectively. Panel (B) shows CH feature locations in heliographic latitude over the observation period. There are 190 CH features represented. Each is drawn as a straight line at the latitude at which it appeared, and for the duration for which it was detected. The associated lines are color-scaled to indicate the CH lifetimes, up to 250 days.