Residents in Joburg and Pretoria have taken to social media, reporting an earth tremor that was felt at about 5.10am.
While it is unclear what caused the tremor, many speculate that it could have been a mild earthquake.
The SA Weather Service has not mentioned the tremor on their daily weather report yet.
Joburg resident Robert Visser told Fourways Review that his house shook for about three seconds during the tremor.
Just experienced a #tremor in #Paulshof. House was shaking for about 3 secs. No I wasn't dreaming ????Anyone else? @Fourways_Review @TrafficSA
— Robert Visser (@Robert_Viss) April 3, 2017
I just felt the Tremor here in Pretoria, maybe ANC ancestors are not happy with all what's happening currently.. #ZumaMustFall #BalekaMbete
— Serame Bohale???? (@SerameBohale) April 3, 2017
https://twitter.com/ellefranchi/status/848736027560771589
Well feeling a tremor in the dark at 5am in Jozi when you're the only one up is on the list of scary things I never expected
— Natalie (@NatAlleyCat) April 3, 2017