Question: why did mount nyiragongo erupt?
Answer: Send Volcano Report It has a 1.2 km diameter summit caldera containing the world's most active and largest lava lake. Nyiragongo is infamous for its extremely fluid lava that runs as water when the lava lake drains. On January 17, 2002, Nyiragongo erupted and the lava lake drained from fissures on its western flanks.