My brother who lives in the south said he was trying to sleep when he felt like if dizzy, the he noticed his bed was actually shaking slightly. In the city he lives, some people left buildings because of the swinging lamps and doors. In So Paulo, fire department received over 100 calls. Quakes are not usual in Brazil, but my brother said he felt one 3 years ago too. I wonder if it was felt here in Rio too. I remember one quake (in Peru?) that was felt in some areas of Rio, but not in all. I suppose it has to do with the kind of soil were your building sits.