Tremors felt

The news reported that there was an earthquake measuring 7.2 on the ritcher scale yesterday at about 1635hrs. I happened to be at home and was on the computer when I felt my chair moving slightly. Initially, I thought Angela was leaning on my chair because I was showing her something. When she said no, I began to speculate that there might an earthquake somewhere in Indonesia. True enough, Angela smsed me a little while later when she was at WM that there was a newsflash on CNA about a tsunami alert due to an earthquake in Sumatra. Guess it is because I stay on the 18th floor so that is why I could feel it. Imagine those staying in even higher floors.