During the 2002 eruption, swaths of lava up to 165 feet wide tore down Nyiragongo's slopes, burning everything in their path. Tephra is a general term for fragments of volcanic rock and lava that ...

Hazards associated with lava fountaining include the fallout materials (termed tephra), volcanic gas emissions, and lava flows. Tephra generally accumulates in the area immediately downwind of the ...