Please note 7+ date hit prediction for 2nd September 2011. A Tsunami warning was issued after the quake at Fox Island ( which was later lifted)
There are 151 quakes ( 7+ quakes ) between 1st January 2001 to 31st December 2010 .
Thus ,there are 15 7+ quakes per year
Now odds for date hit are 15/360 ie 0.0416 ie 5% chances of quakes,if you give a random date