Photo of the Dubbi volcano: Tesfa News
In northeastern Africa, the stratovolcano Nabro lies in Eritrea and Ethiopia.
On June 12, a swarm of quakes in the region caused the volcano to expel an ash plume that spread across northern Africa and drifted out to a thousand miles in length.
The nearby Dubbi volcano has also erupted. When this volcano last blew in 1861, it threw pumice into the air over the Red Sea and plunged the area into darkness.
Flights in the region have been disrupted by the large quantity of ash over Egypt and Sudan, and in the Middle East as well.