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The Council for Geoscience says its busy identifying earthquake hotspots in South Africa's urban areas.
Spokesperson, Michelle Grobbelaar, says this is to help mitigate future disasters due to building damage during an earthquake.
According to the council's map, the areas around Johannesburg, Cape Town, Bloemfontein are considered hot spots.
Grobbelaar says what these hot spots indicate are the areas where one can expect higher levels of seismic activity.
A 3.8 magnitude earthquake hit South Africa on Friday.
Earlier this month, a 31-year-old man was killed in a mining village near Orkney, North West, when a 5.5 magnitude earthquake struck the region.
At least 34 miners were injured, and more than 600 houses damaged.
