Hot ash and gas rise quickly to form a towering eruption column directly above the volcano. Above left: Ash from the 1993 eruption of Unzen volcano in Kyushu, Japan rises halfway up the walls of a ...

When a volcano erupts there can be lava, ash, steam or gaseous emissions. Sometimes eruptions are explosive and lava is thrown out as volcanic bombs. Hotspots are places where the magma rises up ...

As seismic activity within the volcano increases ... a large elongated fissure or fracture (as seen on the diagram above) or a tiny ground crack. Nyiragongo is notorious for releasing large ...

Scientists say they used satellites and other technology to plumb the inner workings of a Bolivian volcano that last erupted ...

Archaeologists uncover a 4,700-year-old hydraulic lift system and unique 'volcano fashion' technique used to build Egypt’s ...