These ghostly hoops have been spotted above volcanic events around the world. But how they form has long been a mystery. Mount Etna—located in Catania, Italy—is one of the rare volcanoes that ...

The study found that the volcanoes formed along twin tracks due to a shift in the Pacific Plate's direction three million years ago. Lead researcher Tim Jones from ANU said scientists had known of ...

The largest volcanoes in Earth’s history owe their formation to powerful geological phenomena called mantle plumes—upwellings of abnormally hot rock within the Earth’s mantle that rise ...

Sometimes it just has lava flows that build up the size of the volcano. But other times, such as in 79 A.D., it erupts explosively and produces large volumes of ash.

Volcanoes with irregular or more elliptical openings didn’t typically form rings. When they did, these apertures warped the doughnut shape or caused the ring to wobble, the team reported.

Scientists have long wondered how volcanoes formed in central Anatolia despite being far from tectonic plate borders—now they've found evidence of a hot plume of magma flowing from East Africa.

If volcanoes formed by the elevation caused by a single central magma-bubble, it was not possible that lava would flow in different directions or come from various, separated craters.

It also gives insight into how volcanoes work and how we may be able to use this natural energy source for our own benefit. The polygonal shape of rocks found at the Giant's Causeway.