Solar storms are a threat to infrastructure such as satellite communications, navigation systems and electrical transmission equipment.
Solar storms release particles that can destroy computer circuits.
The intensity of solar storms is expected to peak in 2013.
In 1859, the largest recorded geomagnetic storm occurred. Telegraph systems all over Europe and North America failed, shocking telegraph operators, telegraph pylons threw sparks and telegraph paper spontaneously caught fire.
That was in 1859.
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