Why earthquake did not cause a tsunami | Broad Canvas | Scoop.it

At a magnitude of 8.6, yesterday's earthquake off the Indonesian province of Aceh was one of the largest ever recorded. Yet the massive tremor, which was followed by an 8.2-magnitude aftershock, did not cause a severe tsunami such as the one on December 26, 2004, which devastated countries around the Indian Ocean and killed more than 200,000.

 

So what is the difference?