In a pioneering move poised to enhance seafloor monitoring capabilities, Portugal is set to embark on the installation of a groundbreaking fiber-optic cable spanning the Atlantic Ocean. This 3700-kilometer-long cable, slated to stretch to Madeira and the Azores, will mark one of the world's first "smart" cables, designed not only for internet data transmission but also for real-time monitoring of seismic activity, ocean conditions, and environmental changes.
The concept of smart cables has long been advocated by geophysicists, offering a cost-effective solution to detect earthquakes, tsunamis, and other geological phenomena beneath the ocean's surface. By integrating sensors into the cable's repeaters, which amplify the optical signal at regular intervals, these cables can provide crucial data on seafloor motion, water pressure, and temperature.
Portugal's initiative, expected to cost €154 million, holds particular significance for regions prone to seismic hazards, such as tsunamis. By detecting tsunami waves at their source, smart cables offer the potential to significantly improve early warning systems, providing precious minutes for evacuation and mitigation efforts.
Beyond Portugal, other nations are also embracing smart cable technology. New Caledonia and Vanuatu recently signed a deal to lay a 375-kilometer-long smart cable between them, with France supporting scientific operations. Italy's National Institute of Geophysics and Volcanology (INGV) has already deployed a smart demonstration cable in the Mediterranean Sea to monitor volcanic activity near Mount Etna.
The global push for smart cables underscores their transformative potential in earthquake monitoring, climate research, and oceanographic studies. By leveraging existing telecommunication infrastructure, these cables offer a cost-effective means to gather real-time data on seismic events, ocean currents, and climate change indicators.
Despite initial reluctance from telecom companies, governments are increasingly mandating the adoption of smart cables, recognizing their critical role in enhancing disaster resilience and scientific research. As smart cable technology continues to evolve, it holds the promise of revolutionizing our understanding of the oceanic environment and safeguarding coastal communities against natural hazards.
