Cycle quake throry for major aftershocks

 My cycle quake theory for aftershocks states that ,major aftershocks, if at all to come are most probable on 7th/8th day and 14th /15th day.

This is because after seven and half days Moon moves 90 degree and after 15 days 180 degrees.

However ,it is not necessary that aftershocks will be of lesser magnitude. 

Yes ,generally they are of smaller magnitude because the strong configuration of planets slowly diffuses (ie move apart) with time and hence lesser magnitude 

However, if there is another stronger combination waiting after 7/8 th days or 14/15th day ,the aftershocks may be stronger than original quake.