One of the most active volcanoes in the world sits just a few hundred miles off the U.S. West Coast, and some scientists ...

There are two main types of volcano - composite and shield. The two types of volcano form in different places and have very different characteristics. Ash released from shield volcanoes often ...

Composite volcanoes are the most common type of volcano. They can have violent eruptions and can grow bigger as layers of thick lava and ash harden on top of each other. Mount Etna in Sicily ...

If you can stay longer, climb Cinder Cone, an outstanding example of the results of volcanism, and, if you have the stamina for a more demanding trek, try Lassen Peak. Four types of volcanoes ...

There are many different kinds of volcanoes, ranging from the Hawaiian type, which produces gentle, effusive eruptions that tourists can observe from mere steps away, to the andesitic variety ...