Johannesburg Tremor “M5.3” – USGS

Preliminary indications suggest that the tremor felt by most people in Gauteng this lunchtime was of Magnitude 5.4 and was centred approximately 6km east of Orkney on the border of North West and Free State provinces.
The recorded depth of the tremor was 10km – that’s quite shallow and explains why it was so widely felt.


Interestingly, zooming in on that epicentre lands you right in the middle of the Vaal Reefs Mine complex.

M 5.3 – 6km E of Orkney, South Africa

Time: Location: 26.986°S 26.741°E
Depth: 10.0km

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