Tens of thousands of people have fled the Congolese city of Goma after officials ordered the evacuation of parts of the city due to the risk of further eruptions from Mount Nyiragongo. The evacuation order came after powerful aftershocks rocked the country on Tuesday morning, with tremors shaking the region every 10 to 15 minutes. Nyiragongo, the most active volcano in the African continent, had roared back to life on Saturday, leaving about 20,000 people homeless and at least 32 people dead, according to the United Nations. “Current data on seismicity and the deformation of the ground indicate the presence of magma under the urban area of Goma, with an extension under Lake Kivu,” Ndima Kongba, military governor of North Kivu province, said on Thursday in a broadcast public address.