There were mild tremors in Chennai today morning at around 9.45am. I couldn't feel a thing. However some friends of mine who were at their offices (in 3rd floor or so) at around that time said that the vibrations were clearly perceptible and that all people in their offices rushed to the ground floor.
When I looked up the net, none of the major Indian news sites had any info on it till around 12pm. Here's some news from the "local portal" Chennai Online (warning: that site is usually laced with useless/annoying pop-ups).