problem with cme,s they can predict when they are due to hit the earth but not an exact time with cme it could last upto 3hrs or less or 24hrs if we could get exact times then race controllers could delay libs until the geomagnetics settled down but as I have said you would have fanciers going daft because you could have a great weather forcast but you were delaying the lib because of something coming from the sun but I think It needs a serious debate and get more opions on the matter