Nord Stream breaches reminder of vulnerabilities in undersea infrastructure

The greatest single release of potent greenhouse gas ever recorded was caused by four breaches of Russia's Nord Stream 1 and 2 gas pipelines, located near the territorial seas of Denmark and Sweden

On the night of September 26, near the end of the calm season on the Baltic, a broiling kilometre-wide circle disturbed the face of the sea and a huge mass of methane erupted into the air. The gas formed a cloud that crossed Europe, in what’s considered the greatest single release of this potent greenhouse gas ever recorded.

It was caused by four breaches of Russia’s Nord Stream 1 and 2 gas pipelines, located in or near the territorial seas of Denmark and Sweden. Seismologists detected explosions at a depth of 70-90 metres on the