I disagree. Care to provide more info?
Here you go retard. Learn to do an internet search.
https://www.perplexity.ai/search/are-fiber-optics-YCOP9sBHRQuOqczUP20Y3g
At this point some people may be scratching their heads and wondering how this could possibly impact optical fibre cables, which don’t use electrical signals or wires to transmit data and instead work by sending laser light over glass (silica) or plastic fibres. According to the ‘Solar Superstorms: Planning for an Internet Apocalypse‘ study, the issue isn’t the fibre, but rather the repeaters that are needed to boost such signals (these are often spaced at intervals of 50 – 150km and are powered using a conductor, which were found to be vulnerable to GIC-induced failures).
,,, I'm skeptical that underseas cables are at significant risk from EMPs because of how conductive salt water is. I might be wrong, especially since the US Navy does use VLF to communicate with submarines, but I don't think so.
Further, the method the repeaters are powered with are IMO not very vulnerable to EMP because they use ungrounded, symmetrical pairs of wires powered from one end. Power disruptions to that end may cause issues but induced current from an EMP essentially has nowhere to go. It might jump to ground at the far end but the circuit should be well insulated from ground.
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