What’s next? Lava is erupting from several volcanoes, including one in Hawaii. Nearly 50 volcanic eruptions have been recorded this year, and more are expected. The Axial Seamount, an underwater ...

What does this mean? We look at why volcanoes exist in the first place, and why some erupt when others don't. Volcanoes are formed when magma (liquid rock) trapped underneath the Earth’s crust ...