Of course you can base specifications on something that has not happened before. And this earthquake was predictable as was the tsunami. I am referring to the electric company engineers. Certainly you build and design to anything way worse than anything that has ever happened.

http://www.washingtonpost.com/world/in-crisis-japans-government-struggles-to-deliver/2011/03/20/ABJJGg0_story.html

And they will "resign". mg