Most volcanoes form at the boundaries of Earth's tectonic plates, which are huge slabs of crust and upper mantle that fit together like puzzle pieces. Think of these plates as massive rafts floating ...

Boulder, Colo., USA: What appears to be a single volcanic eruption is often the result of complex processes operating deep beneath the surface, where magma moves, evolves, and changes over long ...

Active volcanoes are inherently hazardous places to work. Even when a volcano is quiet, volcanic gases, ground cracks, earthquakes and uneven surfaces can be unsafe. Advanced planning and preparation ...

An undersea volcano off Oregon’s coast will likely erupt in 2025, scientists say. Known as Axial Seamount, it’s the most active volcano in the Pacific Northwest – though one most people haven’t heard ...