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June 11, 2013: Massive filament across the disk at teatime

michael.h.f.wilkinson

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michael.h.f.wilkinson

michael.h.f.wilkinson

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We had a solar tea break, and were rewarded with some modest prominences, and a MASSIVE filament crossing the disk southwards of the centre. I estimate it at just above 1/3 of the diameter of the disk, so about 500,000 km. Now that's a proper filament. surprising to see such activity in H-alpha when white light is so quiet

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