Geological Hazards

AON Benfield did a study in 2010 to assess the risk of future earthquakes in Cape Town. They used data from historical earthquakes around the area between 1620 and 2006 and calculated the average return periods for magnitudes between 3.0 and 6.87, the results of which are shown in Figure 1. The figure below shows that (for example) an earthquake with a magnitude of 6.0 and larger would be expected to occur every 300 years. The predicted upper limit earthquake for the Cape Town area is 6.87.

Screen Shot 2013-03-23 at 11.36.45 PM


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