Previous cosmic ray episodes are recorded as Miyake Events: https://en.wikipedia.org/wiki/Miyake_event https://en.wikipedia.org/wiki/Miyake_event Most of thes

Previous cosmic ray episodes are recorded as Miyake Events: https://en.wikipedia.org/wiki/Miyake_event https://en.wikipedia.org/wiki/Miyake_event Most of these are solar activity. But perhaps, maybe and perhaps, it is just about possible, that the 1052 Miyake Event was caused by the 1054 Crab Nebula supernova: https://en.wikipedia.org/wiki/Crab_Nebula https://en.wikipedia.org/wiki/Crab_Nebula The speculation would be that cosmic rays arrived a couple years before Chinese astronomers noticed a change in visual appearance (naked eye, of course, no telescopes).