Volcanoes
Scientists have found that the 2022 eruption of an underwater volcano in the South Pacific triggered a chemical process that removed significant amounts of methane from the atmosphere. The discovery, detailed in a new study, shows how volcanic ash and seawater combined to break down the potent greenhouse gas.
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The Puracé volcano in Colombia's Cauca department continues to emit ash, leading authorities to keep the alert level at yellow. This status indicates changes in volcanic activity without an imminent eruption. Residents in nearby areas, including Popayán, reported ash fall since May 7.
Researchers have discovered that shear forces within volcanic conduits can trigger gas bubble formation in magma, independent of pressure drops. This mechanism helps explain why some gas-rich volcanoes produce gentle lava flows instead of violent eruptions. The findings, published in Science, could improve eruption forecasting models.
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Researchers have discovered that continents are slowly stripped from below by mantle waves, feeding volcanic activity in distant oceans. This process explains continental chemical signatures in remote ocean islands. The findings, published in Nature Geoscience, challenge traditional views on mantle dynamics.