We had a couple of days too overcast to do any solar imaging. But today, there were large, clear patches of sky. Today’s H-alpha image shows significant prominence activity along the sun’s NE and eastern limbs. Smaller prominences appear along the SW limb. There are bright plages around sunspot regions AR4100 and AR4099.
The corresponding sunspot image shows five active regions with AR4096 about to reach the western limb and disappear to sun’s far side.
The prominence cameos in the gallery below show an arch-like prominence along the NE limb high above the chromosphere. Looking at the eastmost part of the arch and inward into the solar disk, you can see a delicate filament (dark line) that represents the prominence extending onto the disk. It appears dark because the sun is hotter and brighter than the blackness of space.
The prominence along the SW limb is also a loop or arch but smaller than the NE one.
