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Giant “stealth” magma surge triggered thousands of earthquakes beneath Atlantic island

Latest Science News -- ScienceDaily·May 14, 2026

Deep beneath Portugal’s São Jorge Island, a massive surge of magma silently pushed upward from more than 20 kilometers underground in 2022, triggering thousands of earthquakes and briefly raising fears of a volcanic eruption. Scientists discovered that the molten rock climbed astonishingly fast — enough to fill 32,000 Olympic swimming pools — before stalling just 1.6 kilometers below the surface in what researchers call a “failed eruption.”

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Giant “stealth” magma surge triggered thousands of earthquakes beneath Atlantic island

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