Mount Nyiragongo erupted in the Democratic Republic of Congo on May 22, killing at least 31 people and forcing 30,000 to flee their homes.
An evacuation order was issued in the city of Goma because of fears that the volcano could erupt again.
Mount Nyiragongo is one of several volcanoes near the DRC's border with Rwanda and Uganda. Its last major eruption, in 2002, killed 250 people and displaced thousands.
The May 22 eruption destroyed at least 900 houses and flattened five schools, according to the Norwegian Refugee Council, a humanitarian organization. It also damaged power and water supplies to the city.