Where africa are most active volcanoes located

The largest number of volcanoes in Africa are located in East Africa, including Nyamuragira, Africa's and one of the world's most active volcano. It erupts roughly every two years, producing large fluid lava flows. But Ethiopia is the country with the largest number of volcanoes. There are 58 volcanoes in Ethiopia. 
I could not discover the place/area that has the largest number of active volcanoes, but I hope this helps.