Deadliest volcanic eruption: The 1815 eruption of Mount Tambora in Indonesia, which killed up to 100,000 people From lava fountains to towering ash clouds, volcanoes produce some of the most dramatic ...

Here’s a look at volcanoes, mountains that open downward to a reservoir of molten rock. More than 80% of the Earth’s surface, both above and below sea level, is of volcanic origin. Lava is molten rock ...

Earth has four main layers. Earth’s innermost layer is a solid core made from iron. It’s outer core is a molten mixture of iron and nickel. These layers are surrounded by Earth’s mantle, the mushy ...

Italy's Mount Etna lays claim to several titles. It is: The world's most active "stratovolcano" Europe's largest and most active volcano One of the best-monitored volcanoes in the world One of the ...

Over 3,000 years ago, the eruption of Santorini’s volcano ended an ancient civilization. Scientists may know what the next big explosion could look like. A man looks out across the Santorini caldera ...

Lava is molten rock from a volcano that reaches the Earth’s surface. Liquid rock below the Earth’s surface is referred to as magma. More than 50% of the world’s active volcanoes above sea level ...