Tremor in Chennai

There were 2 tremors one at 2:15pm & the other at 4:30pm today 11th April 2012. I felt the first one ... Lasted for well over 25 seconds. In the next 5 min the building was evacuated. The twice a year mock drill we performed came in handy. There was no commotion or confusion. While there were tsunami warning around 5:00pm and the coastal road and settlements (shops and public) were evacuated , later the warning was with drawn.