Clue from people AD 1269 Korean

A white band about 3 degrees wide stretched across the night sky, Korea, 15 February 1269

Cited by Miyahara et al. 2022 from Abbott and Juhl 2016: 'a white cloud with a width of 3 degrees spread across the sky at night.' Miyahara's team pairs it with the 1268 to 1269 radiocarbon jump: a burst of particles in February 1269 would show in the 1269 ring of their conifer. This record is not in the Yau 1995 catalogue we used, which is why we earlier thought 1268 had no witnesses.

How it connects

This clue from people argues against 1268: we thought nobody saw it, but Korea did, and it is already published a witness exists after all

This clue from people is a clue for 1268 carbon-14 candidate

This clue from people we read it in Abbott and Juhl 2016, compilation of Korean aurora records cited by Miyahara et al. 2022 for 15 February 1269 and 9 February 1261 (not yet read)

This clue from people we read it in 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)

This clue from people came from this step Read the Miyahara 2022 paper Ken found