New Zealand detects Pacific earthquakes using undersea cables

Scientists in New Zealand have successfully detected earthquakes in the Pacific Ocean using a new technology. The project was led by the National Physical Laboratory (NPL) and the Measurement Standards Laboratory (MSL). The team has modified a part of the Southern Cross Next seafloor cable, which connects New Zealand to Australia. They used optical measurements to transform the cable into sensors that can monitor earthquakes and ocean currents. This method has allowed them to collect data from the ocean floor, where there are few permanent sensors. Since starting measurements in October 2024, the researchers have recorded over 50 earthquakes. These tremors were located from tens to hundreds of kilometers away from the cable. This new detection method is expected to improve research on earthquakes and related ocean activity. The team plans to continue collecting data until December 2025. This initiative could pave the way for a global network of undersea sensors using existing cables. Most of our planet’s surface is ocean, but the seafloor remains largely unmonitored. This innovative technique could enhance our understanding of seismology, oceanography, and climate change. Tsunami specialists will analyze the data for its potential use in tsunami detection. Combining new and traditional methods could improve response capabilities for natural disasters, particularly for coastal communities at risk. Giuseppe Marra from the NPL expressed excitement about this first test in the Pacific. He highlighted the collaboration between the UK and New Zealand as a significant achievement. Dean Veverka, from Southern Cross Cables Limited, also emphasized the importance of early detection of earthquakes for community safety. Officials from both countries see this project as a step toward advanced technological collaboration. They are hopeful it will bring life-changing benefits to Pacific communities.