When a volcano erupts there can be lava, ash, steam or gaseous emissions. Sometimes eruptions are explosive and lava is thrown out as volcanic bombs. Hotspots are places where the magma rises up ...

Magma is the name given to molten material inside the earth (volcano) whereas lava is the name given to molten material which is often ejected from a volcano and then cools and solidifies.

a volcano-like structure rising more than 500 meters from the seafloor and possibly emitting gas. The discovery came as scientists from different organizations were aboard the Healy, one of two ...

After suspecting the presence of a series of underwater volcanoes near the Cook Islands, researchers have now mapped out the newly discovered structures.