I don't know how many have been since 1859 that has happened if any. But, in 2012 that would be about some years. Now, do we have any recorded history of solar emissions such as that? Maybe the one that hit the Eastern US again in 1965, that's 104 years. There was a power grid downfall cascade that started in Canada not too long ago.
But, we don't know if the warning are real or just memories that recur.
I think it is memories that haunt.
September 2, 1859 Event
•Rochester NY -“Some who saw the display attributed it to fires in the towns about.”
Had to change the dates around and correct some errors. Probly made more though.
Edited by greggK, 11 April 2009 - 04:26 PM.