Volcanoes are grouped into four types: cinder cones, composite volcanoes, shield volcanoes and lava volcanoes. Cinder cones are circular or oval cones made up of small fragments of lava from a single ...

The White Island Volcano in New Zealand – which erupted Monday with a towering blast of ash and scalding steam, killing at least five people – is one of New Zealand's most active volcanoes. The ...

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 ...

Volcanoes repeatedly remind people of Earth's potential for violence. Since 1700, volcanic eruptions have killed more than 250,000 people and devastated scores of communities. What causes these ...

If you think back to the fall, I asked Eruptions readers to submit questions for Dr. Shan de Silva (right) from Oregon State University, who has been in the news for research at the inflating Uturuncu ...

Mt. Hood looms over Portland, Oregon.Credit: Barb Salam, Wikimedia Commons. The Oregon Cascade Range is ... complicated. From the surface it looks like the chain of volcanoes that we started exploring ...

Volcanoes are a natural part of our Pacific Northwest existence – if you lived here during the eruption of Mount St. Helens in 1980, you know that all too well. But even if you weren't here during the ...