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 ...

Over the past week, the volcano, which crosses Lumajang Regency and Malang Regency, East Java, has erupted 42 times. Semeru ...

Learn more about the area around Mount Tambora and how, even though it was once the site of the largest eruption on record, ...

But the defining event of Monday’s eruption was the more rare pyroclastic flow from the southwestern crater not visible from a distance.

Thousands of people have evacuated regions surrounding the Mayon Volcano in the Philippines as the mountain continues to spew lava and show increasing signs of unrest.

In the Philippines, Mayon is erupting spectacularly, creating a lava flow that stretches over 3 kilometers (2 miles) from the crater, 600-meter lava fountains, pyroclastic flows that followed gullies ...

Pyroclastic density current (PDC): A turbulent, high-density flow composed of volcanic ash, lapilli and gases that descends rapidly along a volcano’s slope following an eruption.

But the defining event of Monday’s eruption was the more rare pyroclastic flow from the southwestern crater not visible from a distance.

Mount Shinmoedake in southwestern Japan has erupted again, spewing smoke to a height of 5,500 meters from the crater.

Mount Etna, the volcano that towers over eastern Sicily, has again captivated the world with a spectacular show, spewing smoke and high into the sky.