Scientists Discover Massive Underwater Volcano Chain Erupting in the Southern Ocean
SYDNEY, Australia – March 18, 2025 – A previously uncharted chain of active underwater volcanoes has been identified in the remote Southern Ocean, according to a joint announcement from the Australian Antarctic Division and the Schmidt Ocean Institute.
What: An expeditionary research vessel, equipped with advanced multibeam sonar and a remotely operated vehicle (ROV), discovered a 500-kilometer-long volcanic ridge, featuring at least 12 distinct cones exhibiting active hydrothermal venting. The ROV captured high-definition footage of black smoker chimneys emitting mineral-rich fluids at temperatures exceeding 350 degrees Celsius.
Where: The chain is located approximately 1,600 kilometers north of the Antarctic continent, beneath the waters of the Southern Ocean near the Macquarie Ridge.
When: The discovery was made during a five-week oceanographic survey that concluded on March 17, 2025.
Who: The finding was made by an international team of geologists, volcanologists, and marine biologists from the United States, Australia, and New Zealand, led by Dr. Emily Carter of the University of Tasmania.
Why: Scientists state the discovery is critical for understanding tectonic plate movement and the geothermal contribution to ocean currents in the region. Dr. Carter noted that the hydrothermal vents support unique extremophile ecosystems, adding a new dimension to biodiversity research in the Southern Ocean.
Context: The Southern Ocean is known for its harsh weather and limited scientific exploration, making such a discovery rare. The team intends to return for a more detailed sampling expedition in early 2026.