What If the Biggest Solar Storm on Record Happened Today?
This article states that if a solar flare similar to one that happened in 1859 would occur today, the consequences would be serious. The magnetic field produced by the flare could damage communications equipment and the electrical power distribution system. The damage to the power grid could be lessened by intentionally shutting down the power grid temporarily before the magnetic surge reaches earth. Sun monitoring satellites give about 20 hours warning time for mitigating strategies to be put into effect.
Summary by Alan Detwiler self sufficiency advocate. Bio at http://www.smashwords.com/profile/view/alandetwiler