400,000km Filament
Taken by David Wilson on September 12, 2026 @
Inverness, Scotland
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Details:
This is a huge filament snaking across AR4528. It measures out at 400,000km which is just over the distance from Earth to the Moon. Note also the main sunspot is pulsing with umbral flashes.
Playback is 900x real time.
Photographer's website:
https://tinyurl.com/5d83mn5j
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