The Smithsonian Museum of Natural History calls Nyamuragira the continent 's most active volcano , with 42 eruptions since 1885 . Lava flowing down southern flank of Mount Nyamuragira , park rangers report . Score: 6 Park 's mountain gorillas not in danger , but lava threaten chimp habitat .
Lava flowing down southern flank of Mount Nyamuragira , park rangers report . Score: 6 Park 's mountain gorillas not in danger , but lava threaten chimp habitat .