Strong aftershock shakes Carletonville

Johannesburg - The Council for Geoscience says the quake that hit South Africa on Friday morning was 3.8 magnitude, and not 4.6 as estimated by the US Geological Survey (USGS).

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"It's the same event. The USGS measurement is done by a machine, and the stations they use are not in as close proximity to the quake as ours, and that's why it's different," council seismology unit manager Michelle Grobbelaar said.

"Once they analyse it, it will start changing."

The USGS said the quake occurred 12km west of Orange Farm, a township south of Johannesburg.

However, Grobbelaar said the quake hit Carletonville, which is about 70km away, at around 01:14.

"After that, there were several aftershocks," she said.

The two major aftershocks were a 3.2 magnitude at 01:15, and a two magnitude at 01:16.

"The other aftershocks were smaller ones," she said.

Earlier, Johannesburg emergency services spokesperson Nana Radebe said no injuries were reported and they were not called out to help anyone.

ER24 spokesperson Werner Vermaak said they were on stand-by after the quake struck but they also were not called out.

On 5 August, 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 were damaged. At the time, the CGS said more tremors were expected to hit the country in the coming weeks and months.

Read more on: johannesburg earthquakes
Valerie Widmann 2014-08-22 11:13:00 AM
What is going on? Another earthquake in a manner of a couple of weeks... I blame apartheid!
truthbetold221 2014-08-22 11:13:38 AM
I knew it, US can't be telling us about our quake. Hands off, it's our quake. We will tell you that we had a quake, you don't tell us. :)
Sako Sello Abie II 2014-08-22 11:26:14 AM
why is US telling us about our own earthquakes though?
Pietor Houlen 2014-08-22 11:47:14 AM
The USGS is set up to monitor nuclear tests around the world, not just earthquakes. In all honesty, I'd take their estimate over the 40 year old equipment SA must have at this point. Doubt it's a big investment priority for the ANC.
Phil Galpin 2014-08-22 11:57:19 AM
'The USGS measurement is done by a machine'. Instead we have a sangoma who throws the bones and then tells us that white mans technology is inferior!
Carlo Rewan Booysen 2014-08-22 12:04:07 PM
The big one is coming
Arno De Kok 2014-08-22 03:16:15 PM
"What is this 3.8 Nonsense?? We DEMAND atleast 10.4!!" JUJU
Silvana De Mattia 2014-08-23 08:41:33 AM
So what was the actual strength of the one in Klerksdorp?
NikkiB84 2014-08-23 04:10:35 PM
An aftershock so long after? Weird...