Did you feel the earth move? Magnitude 4 tremor hits Joburg

2013-11-18 11:08

An earth tremor measuring four on the magnitude scale was recorded in Joburg today, the Council for Geoscience said.

Manager of the seismology unit Michelle Grobbelaar described the tremor as “quite a big guy”.

The preliminary analysis indicated the epicentre was near the University of Johannesburg just before 10am.

One Twitter user said: “There was a tremor in JHB about 20mins ago. Building shook for about a minute. I’m still shaking.”

Another tweeted: “Oh, so the tremor thing happened all over Joburg? Lol I thought it was just because of the construction in our office park.”

Quakes, or tremors, are the result of a stress build-up in the earth’s crust. When the stress becomes too great, it is released in the form of a quake, usually on a geological fault line.

Grobbelaar said previously that after an earthquake, it was a rule of thumb that another tremor of similar magnitude could be expected in the same region, but seismologists could not predict when this would happen.

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