Most volcanoes form at the boundaries of Earth's tectonic plates, which are huge slabs of crust and upper mantle that fit together like puzzle pieces. Think of these plates as massive rafts floating ...

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 ...

Volcanic eruptive activity may take many forms, from gently erupting basaltic fissures in Hawaii to intense explosive eruptions like those of Mount St. Helens. Volcano observatory scientists are ...

Learn about how volcanoes are formed and the ways they erupt Chiara Maria Petrone, Roberto Scandone, and Alex Whittaker On February 20, 1943, Dionisio Pulido and his family were working in their ...

Volcanoes are one of nature’s most awe-inspiring creations, giant mountains ejecting red hot lava that are both beautiful and deadly. We recently explored why volcanoes are so astounding, but, did you ...

The recent eruption of Italy's Stromboli volcano has the potentially deadly natural phenomenon on everyone's radar as Hawaii's Mauna Loa is also displaying signs of increased seismic activity.

More than 1,000 active volcanoes around our planet can sputter glowing lava and smoky ash, and the world's biggest one has erupted in Hawaii after 38 years dormant. The largest active volcano in the ...

In the predawn darkness, a team of scientists climbs the slope of Mexico's Popocatépetl volcano, one of the world's most active and whose eruption could affect millions of people. Its mission: figure ...