The earth has been hit by CME’s for millennia. A big one hits around every hundred and fifty years. But until the mid-eighteen hundreds, this was just a very large Arora light show that could be seen worldwide. There have been accounts across history, where these events have turned night into day, they were that bright. Until the invention of telegraph, it was thought they were harmless. Then came the Carrington event. Telegraph wires were glowing, Telegraph operators were electrocuted. It started fires in a few telegraph offices and damaged their equipment and batteries.