Joburg feels earthquake

Johannesburg had an unusually large tremor at 2pm today, and I just felt another tremor a few moments ago.
Quite disconcerting.

I wonder if the Vuvuzelas cause some kind of harmonic disturbance to the earth's crust?

An earthquake measuring 4.3 on the Richter scale was felt along the West Rand and parts of Johannesburg on Monday afternoon, the Council for Geosciences said.

The quake, recorded just before 2pm, was relatively stronger than those usually measured along the mining belt, seismologist Ian Saunders said.

The council recently said it was conducting a study of quakes along the Johannesburg and far West Rand mining area, many of which are attributed to mining activities or abandoned mines.

Link

Confirmed ... a 4.9 Magnitude tremor:
Link

[edit on 14/6/2010 by deltaalphanovember]