Have you heard of the september 2010 earthquake/tsunami?

there is something thats is on the web predicting a large 8.0-8.5 quake in san francisco in september of 2010. i don't truly believe it but. it has been stated as far back as november 2007. this comes from so called religious prophecies. i'm not religious and i don't believe prophecies but i am curious to if you can predict an earthquakes? if it is possible, how far out can you predict? how big would a tsunami be?