Johannesburg - A 3.7 magnitude tremor was recorded on the Gauteng's West Rand in the early hours of Friday morning, the Council for Geoscience said.
- Did you feel it? Send us your stories.
Seismologist Dr Martin Brandt said the epicentre of the quake was the far West Rand gold mines, in the Fochville area. It was recorded at 01:28.
"The tremor was felt in Krugersdorp, Parys, and Vanderbijlpark," he said.
A News24 reader said he felt a "medium tremble" in Brakpan on the East Rand around 00:50 on Friday.
Gauteng Weather tweeted earlier about the rumble.
"#Tremor Multiple reports of an earth tremor in the #Gauteng area just before 01:30. Quake reportedly felt from the Soweto up to the Vaal," @WeatherSA tweeted.
Another Twitter user @KontrolKhotso, said he felt the tremor in the south of Johannesburg.
"Tremor always sneak up on us, my heart is racing."
Twitter user @jack_knifedt asked: "Was there a tremor last night? I thought it was thunder."
User @DineoM16 tweeted in the early hours of the morning: "Am I the only one that got woken up by the earthquake/tremor at 01:29?"
@TheDonMel tweeted: "That #Tremor had me pray! If I die before I awake, I pray the Lord my soul to keep."
User @Sweet_Elvina tweeted: "I just felt the house shake. Did anybody feel it? #Tremor."
Tremor ??always sneak up on us, my heart is racing ??
— Amethyst (@KontrolKhotso) June 11, 2015
Was there a tremor last night? I thought it was thunder
— Mabz (@jack_knifedt) June 12, 2015
01:28 am 12 June 2015, I was woken up by a tremor in Jozi. What is God trying to tell us in SA? #tremor #earthquake
— MaBoni (@Boniquat2) June 11, 2015
That #Tremor had me pray! If I die before I awake, I pray the Lord my soul to keep.
— Black Industrialist (@TheDonMel) June 12, 2015
I just felt the house shake. Did anybody feel it? #Tremor
— Elvina~Mokgadi (@Sweet_Elvina) June 11, 2015