The aurora so strong telegraph operators in Boston and Portland were able to disconnect their power supplies and still transmit messages - Universal Hub
universalhub.comSubmitted by universalhubcom7170 in science
So far, the auroras we've seen have been a fun phenomenon but haven't caused any problems on earth. A series of auroras over several days in 1859, though, was so powerful they knocked out telegraph service across North American and Europe - and even started s…