Satellite images taken more than three decades apart show the disappearance of Iceland's Okjökull, the first glacier to be ...

Axial Seamount is a shield volcano, similar to Mauna Loa, the world's most active volcano located in Hawaii. Shield volcanoes typically produce runny lava flows that result in gentle slopes.

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 ...