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Solar storms have affected ground-based communications and electrical systems since the time that these systems became commonplace.
During the 1800's, telegraph systems were frequently disrupted by severe magnetic storms ,such as the spectacular events of August 28 and September 2, 1859.
During the 20th Century, solar flares regularly caused so much interference that global shortwave communications outages were a commonplace nuisance during the 1930's - 1950's.
Once elaborate electrical power grids were installed spanning entire continents, they too fell victim to solar storms ,such as the major electrical blackouts in Quebec during March, 13, 1989 and southern Sweden on October 29, 2003. [More]
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