On volcanoes, a fissure is an elongated fracture or crack at the surface from which lava erupts. Fissure eruptions typically dwindle to a central vent after a period of hours or days. Occasionally ...

Lava flows come in a great variety of shapes and sizes. Nyiragongo is considered one of the most dangerous volcanoes in the world because of its particularly fast-moving lava, which can flow more ...

Volcanoes can look like small mountains or hills. A volcano is an opening in the Earth's crust that allows magma, hot ash and gases to escape. Composite volcanoes are the most common type of ...

Scientists have collaborated to analyze the inner workings of Bolivia's 'zombie' volcano, Uturuncu. By combining seismology, physics models and analysis of rock composition, researchers identify ...

When Maureen Long talks to the public about her work, she likes to ask her audience to close their eyes and think of a ...

Deep in the Central Andes lies Uturuncu, Bolivia's "zombie" volcano—so-called because, despite being technically dead (last erupting 250 thousand years ago), it still shows signs of unrest ...