According to Volcano Discovery, the tremor was detected on Tuesday at 15:41, about 21 km north-east of Hendrina.

Mr Wolmarans said that the location of the quake was closer to Arnot and that Hendrina and Carolina residents never felt or heard anything.

According to a Rietkuil resident, they did feel and hear the impact of the tremor, but explained that it was typical to a blast from the mines.

It could be possible that the seismic activity that was detected was caused by a blast.

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