The Mail on Sunday on 5th July 2009 had an interesting and detailed article on transatlantic cables. Given the current news, it’s worth re-reading:
Most people think the internet is beamed around the planet by satellites. In fact, 90 per cent of global internet traffic is carried by a vast cable network, thousands of miles of which snake under the oceans.
The two busiest internet hubs are New York and London, and nine cables link them. But the one pictured above is the Atlantic’s newest and most advanced submarine cable system. It is so powerful that it could carry the entire internet content in both directions even if the other eight lines failed simultaneously.
It travels 3,800 miles along the seabed from New York and reaches land at this north Cornish beach, making this remote footnote on Britain’s coastline one of the most important and powerful telecommunications hubs in the world.
You can read the full article here.