The distance of Semeru volcano's pyroclastic flow, originally at 4.5 km, has now extended to 8 km. Its maximum amplitude has also increased to 40 mm.

Mount Semeru, the highest active volcano in Java, Indonesia, has erupted with an enormous 54,000-foot ash cloud, triggering red-level flight safety warnings from Australia. The eruption happened in three explosive stages,

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 pyroclastic flows, as a result of turbulence, laboratory and ...

The Geological Agency has set the volcanic activity status of Mount Semeru in Lumajang, East Java, to level IV or Warning since Wednesday afternoon, November 19, 2025, at 5:00 PM local time. An hour earlier,

One of the leading killers during explosive volcanic eruptions is a family of superheated gas, ash, and debris known as pyroclastic density currents. These tumbling, turbulent paroxysms rush downslope at temperatures as high as 1,300°F and at speeds often ...

The Geological Agency of the Indonesian Ministry of Energy and Mineral Resources has raised the activity status of Mount Semeru in East Java to Level IV