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 ...

This means that when a shield volcano erupts, the lava is extremely fast and can cover large areas very quickly. Some of the most famous examples of shield volcanoes make up the islands of Hawaii.

Poland described the volcano as "fascinating " but reassured it "doesn't really pose a hazard". The Axial Seamount is a shield volcano, akin to Mauna Loa in Hawaii, the world's most active volcano.