Mystery Looking good AD 1052

1052 carbon-14 candidate

Brehm et al. 2021 flagged a rise in tree-ring radiocarbon at 1052 to 1053. Four studies now cover these years and disagree on when the rise starts: 1053 (Brehm; Rakowski 2026 Kujawy oak) or 1054 to 1055 (Scifo 2024 Furness oak; Terrasi 2020 sequoia and pine). Not confirmed by beryllium-10 or chlorine-36. Two rival hunches: a solar storm in late 1052, or the 1054 supernova.

How it connects

This mystery has this clue Tree-ring radiocarbon jump between the 1052 and 1053 rings (English oak STK-C10)

This mystery has this clue Kujawy oak, Poland: radiocarbon rises from the 1053 ring and peaks in 1055

This mystery has this clue California full-ring sequoia (Eastoe 2019): radiocarbon rise between the 1052 and 1053 rings

This mystery has this clue Furness Abbey oak, England: no clear jump at 1052 to 1053, a small rise 1054 to 1055

This mystery has this clue California sequoia and Finnish pine: radiocarbon rise around 1054 to 1055 at both sites

This mystery has this hunch or step The 1052 white vapour matches the 1052 radiocarbon candidate

This mystery has this hunch or step The 1054 supernova, not the Sun, made the carbon-14 rise of 1053 to 1055

This mystery has this clue White vapour to the north, Kaifeng, 13 December 1052

This mystery has this clue White vapour shaped like a turtle, with a blue-violet vapour inside it, Korea, 18 July 1052

This mystery has this clue Two white vapours rose from the northwest and pierced the Sun, Korea, 27 January 1053

This mystery has this clue A comet in the southern sky with a tail over 1 zhang, Korea, 25 February 1053

This mystery came from this step Started the notebook seed row