A satellite image has captured the simultaneous eruptions of Africa’s most active volcanoes, Mount Nyamuragira and Mount Nyiragongo, located in the Democratic Republic of the Congo. Taken in 2014 by ...

Ash released from shield volcanoes often builds up around the vent forming a steep, round hill known as a cinder cone. A lava tube may also form, beneath the surface of the ground, when low ...

Four types of volcanoes—shield, composite, cinder cone, and plug dome—can be found in Lassen Volcanic National Park, where they literally bubble and steam.