Tephra includes large, dense chunks, light rock debris, and ash. The restless lava lake in Nyiragongo's summit crater regularly causes eruptions of gas and smoke laden with tephra. Lava is the ...

Sims led the descent into the crater, anchoring ropes and spidering down walls. The rest of the party followed. Nyiragongo is in the Great Rift Valley, where the African continental plate is being ...

Satellite pictures confirm there is a persistent lava lake inside the crater of a remote British ... Lava lakes are also known at Nyiragongo Volcano, DR Congo; Erta Ale Volcano, Ethiopia; Mount ...

Among the most active and deadly of these volcanoes is Nyiragongo, a so-called stratovolcano located just north of the city of Goma in the Democratic Republic of Congo. In this interactive ...