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Underground Link of Volcanoes
October 2 , 2025
11 hrs 0 min
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- A swarm of over 1,200 earthquakes in early 2025 revealed a shared magma source between Santorini Island and the nearby Kolumbo submarine volcano, located in Greece.
- Seismic and GPS data showed that both volcanoes experienced surface deflation.
- It was suggesting that the magma moved from a deep reservoir beneath the Aegean volcanic arc in Greece, feeding both systems.
- Santorini began swelling in July 2024, indicating magma buildup, followed by a migration of earthquake activity in January 2025.
- This is the first confirmed magmatic connection between the two volcanoes.
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