Figure 1. (IMAGE)
Caption
Observation of the solar dynamic observatory (SDO). The image shows a composite of the seven different extreme-ultraviolet filters (colored slices) and the magnetic field information (gray scale slice). The detected coronal holes are indicated by red contour lines. The dark structure at the center is a solar filament that shows a similar appearance but is not associated to coronal holes.
Credit
Jarolim et. al., 2021.
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