Prefer Newsweek on Google to see more of our trusted coverage when you search. Scientists have discovered that the scorching material spewed from a volcano during eruptions generates a layer of air ...

Pyroclastic flows are some of the most fearsome hazards posed by erupting volcanoes. These avalanches of superheated ash, gas, and rock are responsible for some of the most famous volcanic disasters ...

Avalanches of ash, gas and rock that cascade downhill during volcanic eruptions may be even more dangerous than scientists had realized. Pulses of high pressure form within these slides, known as ...