CME and EMP, was How is your backup regime?
I just edited an "Electronic Design" article that discussed EMP and related
issues.
Major CMEs occur every 60 to 80 years. One back in the 19th century
disrupted telegraph lines. The most-recent one, in the '80s, brought down at
least one power system in Canada, and damaged generators.
A major SEMP (not to be confused with one of the Three Stooges) could wreck
huge sections of the power grid, doing damage that would take years to
repair.
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