Miyahara et al. 2022, Recurrent large-scale solar proton events before the onset of the Wolf grand solar minimum, Geophysical Research Letters 49 (free to read; read in full 25 Oct 2026; data on figshare doi 10.6084/m9.figshare.17096975)
How it connects
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Small radiocarbon rise, 1261 to 1262 (Miyahara 2022)
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Largest of the three 13th-century candidates, 1268 to 1269 (Miyahara 2022)
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Radiocarbon rise 1279 to 1280: three labs, three sizes
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1268: we thought nobody saw it, but Korea did, and it is already published
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Korea's violet glow of 25 October 1279 falls in the window for the 1279 to 1280 radiocarbon jump, and the main paper missed it
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A white band about 3 degrees wide stretched across the night sky, Korea, 15 February 1269
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Get the two paywalled papers