Singapore felt the tremor but I am in Kuala Lumpur and did not feel any earth movement.
I read in the news, fortunately the casualties are not many at least not like the one that happened in Jawa last year.

Today I just talked to my long lost Indonesian friend the first time in years. A couple of hours later I heard of the quakes, and I went frantic because all I knew was that she lives in Medan but no idea where it is on Sumatra Island. It turned out that we were chatting over Skype when the 2nd quake took place, and she didn't feel a thing. Thank goodness!

when will this end I wonder.....catastrophes after another.....

I feel terrible for all the lives lost and all the devastation. Wish there were lots of minor tremors, to 'relieve' the pressure, instead of these big ones.

Source: http://indahnesia.com/earthquake/earthquake.php

For your info, there were 31 "big" earthquakes reported over last week in Indonesia and 115 earthquakes over the last four weeks

So, Indonesians have to be aware with this situation because we live in the most dangerous area in the world.