The Axial Seamount, an underwater volcano located about 300 miles off the coast of Oregon, is displaying behavior that ...

Yellowstone's magma system shows new activity, with the northeast sector possibly hosting future volcanic activity.

Mars' dramatic north-south divide has puzzled scientists for half a century. However, they may now have a conclusive answer.

The building blocks of life could have been delivered to Ceres by one or more space rocks from the outer asteroid belt.

For decades, scientists believed that magma chambers beneath volcanoes were transient, forming before an eruption and then ...

Data collected by NASA's InSight lander suggest that ancient internal processes are responsible for the "Martian dichotomy" ...

That movement has now left one pool of molten material on the west of the caldera disconnected from any heat sources, which will likely allow it to cool. Meanwhile, the largest pool of near-surface ...

It shows the underground plumbing system that provides molten and partly molten rock to the magma chamber beneath the Mount Rainier volcano in Washington state. The scale at left is miles depth.

A lava delta is created when molten rock reaches a flat area and spreads out in multiple directions like a fan. After this lava delta collapsed, new lava spewed from the tube like a fire hose into ...

Those events are labeled “caldera forming,” because the molten rock vacating the underground reservoirs leaves an empty space, which leads to the land above collapsing, ultimately forming a ...

A volcano is a mountain that opens downward to a reservoir of molten rock below the surface of the earth. Unlike most mountains, which are pushed up from below, volcanoes are vents through which ...