After Japanese super quake of 11th March 2011 ,the area is under more strain??

hi
please see the link-news -
http://www.dailymail.co.uk/sciencetech/article-1389247/
or
see google news at the right side of this blog-Japanese earthquake: ocean floor moved by 79 feet
The article says
After the maga quake of 11th MArch 2011, there are immense seismic stresses remained in the area(more than that before the quake) and that ,there are chances of further major quake/s
The data showed that-contrary to previous openion-the area have build up massive amount of strain prior to the earthquake.
Now the question is
How such things can happen-with respect to -Plate tectonic theory?
We say that ,after the stress is built up to limit,the quake occur and releases the stresses.
Do we have to rethink the authenticity of plate tectonic theory it self? Are we believing the theory blind folded?

Amit