Hunch Not checked yet AD 1098

Kyoto and Augsburg saw the same great aurora on 21 September 1098

Same night and same direction (north) as Augsburg's 'blood-red clouds toward the north', with Europe seeing auroras again on 25 to 27 September. But the Kyoto note gives no colour: 'strange clouds' in the north and two white bands across the sky. White bands are a common East Asian aurora description, yet at Kyoto's latitude a great storm would usually show red, and strange clouds at dusk can be ordinary clouds. So this is an intriguing same-night coincidence, not yet a confirmed aurora. China records nothing (the Song list jumps from 1088 to October 1099). No paper found linking these records. To do: Sigebert of Gembloux and the Angers annals in the original; Goryeosa for September 1098; Kyoto's magnetic latitude in 1098; other Japanese diaries for 承徳2年8月 (e.g. Gonijo Moromichi-ki, which ends 1099).

Korea checked 25 October 2026: nothing in the Goryeosa for the 8th month of 1098. With China and Korea silent and no colour in the Kyoto note, this stays a same-night curiosity, leaning weak. Parked.

How it connects

This hunch is about A great aurora in September 1098, seen in Europe, and perhaps in Kyoto?

This hunch is supported by Kyoto: strange clouds in the northern sky and two white bands across the sky, evening of 21 September 1098 red in the north, white bands, same night

This hunch is supported by Europe: blood-red clouds to the north on 21 September 1098, then the sky burning on 25 to 27 September blood-red clouds to the north the same night

This hunch is argued against by Korea: nothing in the sky in the 8th month of 1098 Korea saw nothing that month

This hunch came from this step Searched Japanese court diaries for the 993 storm; found a 1098 aurora instead