Volcanic activity encompasses all processes associated with the movement and eruption of magma and volatiles from Earth’s interior to its surface, including effusive lava flows, explosive eruptions, degassing, and the formation of associated edifices and deposits. It is governed by magma generation in the mantle and crust, melt composition, temperature, volatile content, and tectonic setting (e.g., subduction zones, rifts, hotspots). Volcanic activity is studied through petrology, geophysics, gas geochemistry, geodesy, and remote sensing to quantify eruption dynamics, magma ascent rates, and hazard potential, and it exerts major controls on crustal growth, surface morphology, and volatile fluxes to the atmosphere and hydrosphere.
Guatemalan authorities said Thursday they were evacuating more than 500 people after Central America's most active volcano spewed gas and ash.
Environment
Jun 6, 2025
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Scientists have uncovered new evidence to suggest that Earth is leaking gases from deep inside its mantle—even in regions without any volcanic activity.
Earth Sciences
Jun 5, 2025
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Mount Etna, the volcano that towers over eastern Sicily, has again captivated the world with a spectacular show, spewing smoke and high into the sky.
Earth Sciences
Jun 3, 2025
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A huge plume of ash, gas and rock spewed forth on Monday from Italy's Mount Etna as authorities warned people to steer clear of Europe's largest active volcano.
Environment
Jun 2, 2025
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32
A research team utilized teleseismic double-difference tomography technology to uncover the morphological changes of the Pacific subducting slab in the mantle transition zone beneath Northeast China.
Earth Sciences
May 29, 2025
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When a volcano erupts, it can spew ash high into the atmosphere—inserting aerosols right where clouds typically form. How exactly these aerosols impact cloud formation has long been a mystery to atmospheric scientists.
Earth Sciences
May 21, 2025
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A mysterious and highly active undersea volcano off the Pacific Coast could erupt by the end of this year, scientists say.
Earth Sciences
May 21, 2025
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273
Scientists know that changing tree leaves can indicate when a nearby volcano is becoming more active and might erupt. In a new collaboration between NASA and the Smithsonian Institution, scientists now believe they can detect ...
Earth Sciences
May 15, 2025
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39
Sophisticated chemical analysis of volcanic gases from Kenya has provided the first evidence that a vast mass of deep Earth material lies beneath East Africa.
Earth Sciences
May 14, 2025
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A restive volcano in central Philippines briefly erupted Tuesday, spewing a 4.5-kilometer (2.8-mile) ash plume and debris into the sky as its rumblings were heard nearby.
Environment
May 13, 2025
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60
