It looks like the Indo-Austrian plate might be starting the long process of cracking into two new plates. If this is true, it would explain two major quakes earlier this year off of Indonesia and a subsequent rash of minor quakes that took place at a never-before-seen frequency for a period of several days around the globe.
Earth cracking up under Indian Ocean - environment - 26 September 2012 - New Scientist:
'via Blog this'
Most of the articles I've looked at discuss this as though it's a new thing, but one mentioned that the process may have started as early as ten million years ago. Either way, it's interesting stuff that shows how dynamic our homeworld is.