
Dormant Volcanoes May Be Breathing Magma, Study Finds
ETH Zurich researchers mapped Methana volcano over 700,000 years and found a surge of zircon crystals during a long dormancy, indicating massive magma buildup beneath the surface even when eruptions cease. This challenges the idea that long inactivity means extinction and suggests subduction-zone volcanism can quietly reawaken. The team notes that monitoring gas, ground deformation, earthquakes, and gravity changes is crucial to detect reawakening in dormant volcanoes; the findings, published in Science Advances, have broader implications for volcanic hazard assessment.




