I found in Science Daily three articles that might be of interest to those fascinated with this subject.
1) The Day The Sun Brought Darkness
http://www.sciencedaily.com/releases...0316144521.htm
(Talks about the Quebec electrical power blackout.)
2)NASA Scientists Dives Into Perfect Space Storm
http://www.sciencedaily.com/releases...1027061940.htm
(Talks on the 1859 Storm)
3) Sun Unleashes Record Superflare, Earth Dodges Solar Bullet
http://www.sciencedaily.com/releases...0404081121.htm
(Discusses the largest flare in the last 25 years. The X20 event was seen in 2001 at last solar maximum) Also see images at;
http://www.noao.edu/outreach/press/pr01/mp.html - the 1.1Mb image is extraordinary! 22 times the diameter of the Earth!