Scientists claim to have seen a glow in the eastern Democratic Republic of Congo, on top of the Nyamulagira volcano.
The most recent information suggests that it was brought on by lava moving from shallow depths towards the Nyamulagira volcano’s crater.
In 2011, Nyamulagira experienced its largest eruption in a century.
It is situated right in the middle of the critically endangered mountain gorilla habitat known as Virunga National Park.
The Goma Volcano Observatory issued a warning on Monday night that in the event of another eruption, lava would flow toward the park.
The city of Goma, which according to UN estimates is home to about 670,000 people, is not currently under threat.
But the observatory added that wind could blow volcanic ash and strands of cooled lava into populated areas.
It advised the people of Goma to remain composed and conduct themselves as usual.
Residents have been urged to wash their produce and use water that has been stored, and airlines have been advised to take the wind direction into account when flying over the Virunga region.
After Mount Nyiragongo erupted in May 2021, tens of thousands of people were evacuated from the city of Goma.