When a solar filament above the Sun’s surface (the darker, slanted line seen before the eruption) became unstable and erupted, it briefly left an empty channel that was almost immediately followed by a series of magnetic loops reconnecting over the channel. The action was caught in this combination of two wavelengths of extreme ultraviolet light (AIA 171 and AIA 304). This kind of channel eruption is not rare, but it is not usually observed so clearly.
Credit: Solar Dynamics Observatory/NASA.
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