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flag A 2025 quake swarm near Santorini, caused by pulsing magma, revealed a hidden link between two volcanoes, but no eruption occurred.

flag A 2025 earthquake swarm near Santorini, involving over 25,000 quakes, was caused by pulsing magma moving through deep crustal fractures, a new study reveals. flag Using machine learning and GPS data, researchers found magma surged from a shared underground reservoir linking Santorini’s caldera and the Kolumbo underwater volcano, generating stress that triggered the quakes. flag Though the magma volume equaled 200,000 Olympic pools, it lacked pressure to erupt. flag The findings, published in Science, rule out tectonic fault slip and offer a new method to monitor unrest in remote or underwater volcanic zones.

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