SAN JUAN ISLAND, Wash. — As dawn broke over San Juan Island, a team of scientists stood on the deck of a barge and unspooled over a mile of fiber-optic cable into the frigid waters of the Salish Sea.

In January, sea ice severed a fiber-optic cable running along the floor of the Beaufort Sea several miles off the North Slope. The line is a key piece of Northwest Alaska’s broadband infrastructure, ...

Fiber optic cables carry internet to much of Europe. To get there, they travel along the floor of the Red Sea.

Microsoft's cloud service is suffering disruptions due to undersea fiber optic cable cuts in the Red Sea, the company announced Saturday. Microsoft's Azure is the second largest cloud services ...

Communications cables are only part of the story. A far broader array of systems now covers the ocean floor – and must be protected. But communications cables are only part of the story. A far broader ...

European nations are accusing Russia of orchestrating a massive sabotage strike on Ukraine’s Western allies after two underwater fiber-optic cables were cut in the Baltic Sea. The 135-mile-long ...

Subsea cables are fiber-optic or electrical cables laid on the sea floor to transmit data and power. They carry around 99% of the world's internet traffic. Iran warned last week that submarine cables ...

Germany’s defense minister said damage to two fiber-optic cables on the sea floor appeared deliberate, but a culprit was not known. By Melissa Eddy and Johanna Lemola Melissa Eddy reported from Berlin ...