Why have there been so much earthquakes lately?

A topic that arises a lot and gained a lot of attention since the Haiti earthquake is why are the so much more earthquakes nowadays? Well previously I thought there were more earthquakes, but now after comparing earthquakes from 1900's to the ones in the 2000's shows that we have much more advanced technology that detects even the slightest earth movemnt. The earth moves a lot. Sometimes it moves without us noticing it and other times it moves so much it destroys buildings and injures people. But basically what I'm trying to say is don't worry about it to much. The world is not ending or anything like that. It's just we have more advanced technology so we detct more plate movemnts inside the earth. Even back then there were many earthquakes and people didn't even notice half of them. Earthquakes are just a natural thing for the earth.