(CNN) — Here's some background information about volcanoes, mountains that open downward to a reservoir of molten rock. Facts: More than 80% of the Earth's surface, both above and below sea level, is ...

Scientists can't know precisely when a volcano is about to erupt, but they can sometimes pick up telltale signs. That happened two years ago with the world's largest active volcano. About two months ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Volcanoes simultaneously erupting across the globe grabbed headlines ...

Globally, there is about one volcano erupting each week. Volcanic unrest kills an average of 500 people every year and costs the global economy roughly US$7 billion (£5.7 billion). With one in 20 ...

The Hawaiian volcano is spewing lava for the first time in 40 years. Here's what to know about the ongoing eruption. Reading time 1 minute Mauna Loa, the world’s largest active volcano, began erupting ...

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 ...

A volcano is an opening in the Earth's crust that allows molten rock, gases, and debris to escape from below the surface. The molten rock that rises in volcanic vents is known as 'magma', and after it ...

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 ...