Stratovolcanoes are cone-shaped volcanoes that build up from layer after layer of lava and ash, one eruption at a time. They're also called composite volcanoes. Mount Rainier in Washington is a ...

A massive volcanic eruption can propel sulfur dioxide through the troposphere — the part of the atmosphere where weather happens — and into the stratosphere, the layer about 7 miles above the ...

A new look at an ancient eruption at Campi Flegrei raises new questions about the propensity of the still-active volcano, ...

Two thousand years on, scholars still don’t agree on the day the destruction of Pompeii began. Two new studies only fan the ...

A deadly ash cloud preserved the man's brain as glass for thousands of years.

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 ...