An undersea fiberoptic cable located between mainland Norway and the Svalbard archipelago in the Arctic Ocean has been put out of action in a still-mysterious incident. The outage on the subsea communications cable — the furthest north of its kind anywhere in the world — follows an incident last year in which different cables linking an undersea surveillance network off the Norwegian coast were severed, a story that we covered in detail at the time. The latest disruption involves one of two fiberoptic cables that enable communications between the Norwegian mainland and Norwegian-administered Svalbard that lies between the mainland and...