Volcanic eruptions result from the ascent of magma from subsurface reservoirs to the Earth’s surface, where variations in pressure and volatile content determine whether eruptions are effusive or ...

The committee hopes that if a major eruption were to occur in the United States in the year 2010, the USGS VHP would be prepared to respond in a manner more similar to Prologue 2 than to Prologue 1.

The “moderately explosive eruption” of the Kanlaon Volcano on Thursday afternoon may be followed by ash emissions or similar short-lived explosive eruptions that could pose risks within its ...

Volcanic eruptions create some of nature’s most dramatic displays. Depending on their magnitude and location, they also have the potential for becoming major social and economic disasters. To date, ...