Around the world, between 40 and 50 volcanoes are currently erupting or in states of unrest, and hundreds of millions of people are at risk of hazards posed by these potentially active volcanos. Yet, ...

When individuals hear volcanoes, they tend to envision blazing eruptions blasting into the air. However, volcanoes can also collapse sideways, with their sides, or flanks, collapsing. Such a collapse ...

A new 3-D model that realistically mimics the 1980 eruption of Mount St. Helens is helping scientists understand the dynamics of such blasts and may help them map potential blast flows at dangerous ...

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 ...

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 ...

New research has provided fresh insight into how huge volcanic ash plumes, which can critically disrupt aviation and cause major impact on the ground, are transported in the atmosphere. New research, ...

Credit: Daniel Rasmussen, Smithsonian. Photo taken under Alaska Maritime National Wildlife Refuge Research and Monitoring Special Use Permit #74500-16-009. Note to editors: Photos of the research team ...