Tremor felt on La Lucia Ridge in Durban

We have just returned to our office building  having experienced a tremor a few minutes ago - around 12.30.  I was sitting next to a wall and felt the tremor very clearly, so I jumped up and left the building!  Others had also left, but it was hardly noticable to some.

Can this possibly be from the same source as the tremor being felt in Johannesburg?