In 1859, a giganticsolarstormhittheEarth, creatingaurorasthatcoveredtheentireplanet, knockingoutthetelegraphnetwork, andsendingsparksflyingfromelectricalequipment.
Thesolarstormof 1859 isstillthelargestonrecord.
Butif a similarstormweretohittheEarthtoday, theconsequencesforourwayoflifecouldbedevastating, knockingoutelectricitygrids, satellitenavigation, andcommunicationsfordays, weeks, orevenmonths.