Thats one of the least stupid things I've heard. Some people a blaming the moon. 
http://obsweatherguy.blogspot.com/2011/03/japan-quake-and-super-moon.html
Well lets see here, having lived on the edge of both the Atlantic and the Pacific most my life I can understand how some would give this a thought.
In my area we are at the edge of the tidal mass that going north and turns into the Bay of Fundy, one of the great wonders of the world.
As we Kayaked about our area we can see the difference when there is a full moon rising, One minute we have 30 feet of water under us and I have been stranded a few times on the mud flats as I could not paddle fast enough to shore to out run the tide.
The configuration of our major river is such that in places the tide will go out leaving 1/4 mile of mud flats or more with just a narrow channel in the middle for boats to navigate to.
The tremendous amount of energy needed to fill or empty the water every 6 hours is unfathomable. Much depends on the depth of the water, the botton and its twists and turns.
Mother lives on a small cove and the low tide mark is perhaps 40 feet in front of her house---But the neighbor who has a dock not 20 feet from her property line has very little flats and has a deep water dock and only 2-3 feet of flats.
Anything with the strength of the moon to displace billions and billions of water every 6 hours all over the world should not be ruled out when it comes to shifting the ocean plates. Add in an earthquake and now we are talking about the most powerfull energy know to man or our planet.
Not too hard to consider the Moon and its gravitational pull as playing a part in all life on earth. Without our moon we would become a dead planet.
