Read the Korean royal annals day by day for 1447 to 1458
Downloaded about 3,600 days of the Annals of the Joseon Dynasty in classical Chinese and counted every sky entry. The Annals of the 1450s never describe the Sun's colour and record few eclipses, so they cannot date the 1452/53 eruption. Logged the winter 1452 to 1453 dark fogs and the 16 November 1453 total eclipse as clues, with their caveats.
How it connects
This step led us to
Daily Korean records can date the 1452/53 eruption to the month
This step is about
The mystery eruption of 1452/53 and the omens at the fall of Constantinople
This step led us to
Korea: dark fogs for days on end, winter 1452 to 1453
This step led us to
Korea: 'the Moon was totally eclipsed', 16 November 1453
This step and then
Searched for the 1453 volcano: Pinatubo fits the date, the sulfur says no
This step came after
Checked the Constantinople omens of May 1453 against the sky and the weather