In the heart of the sea depths, where silence reigns supreme, a technological revolution is transforming underwater optical cables, silent guardians of our communications, into advanced environmental sensors. Thanks to a discovery by the National Physical Laboratory, the ocean floor opens up to a new era of monitoring, promising significant advances in the detection of underwater earthquakes and tsunamis.
A sea of data
Undersea optical cables, vital arteries of our connected society, are destined to become crucial tools for science. A study published in Science Magazine (I link it here) reveals how these cables can function as an extended network of environmental sensors. It is a significant breakthrough in the observation of our planet, and offers us an unprecedented perspective of the underwater world.
The main problems in ocean monitoring have always been the high cost and technical complexity of installing fixed sensors on the seabed. The research conducted by the NPL and its partners paves the way for widespread and economically sustainable monitoring of the oceans. And using existing infrastructure, to boot.
Optical cables for earthquake and tsunami detection? Yes it can.
Previous studies at Caltech (I talked about it here, news on the sly due to Covid) had already demonstrated the possibility of using submarine optical cables to identify earthquakes. The novelty lies in the ability to transform these optical cables into sensor arrays, exponentially increasing the precision and effectiveness of detection.
Tests carried out on a transatlantic link have made it possible to detect earthquakes and other oceanic anomalies in incredible detail. An unprecedented detail.
Towards a secure future
The most exciting potential of this technology is linked to disaster prevention. The ability to detect earthquakes that can generate tsunamis in real time offers a crucial window for evacuating and securing populations at risk. The research team led by the Italian Joseph Marra is planning to extend the tests to cables located in areas of high seismic activity, such as the Pacific Ocean.
Technological innovation is leading us towards a future where our ability to monitor and understand the planet will reach levels never seen before. Undersea optical cables, once simple data conductors, are on their way to becoming vital tools in the fight against natural disasters.
