hi
After a major quake at given place(when plnet pull and combination is higher)next surge in pull occure when Moon moves 90 degree (7/8 days).Thus quake at 90 degree.Slowly the combinationfades away as slow moving planets also moves away.Another surge at180 degreeand finaly fades away at 270 degree in 3 week.
In fact some of the 6+ quakes occur at 180 degree on the same dayas pull apply at both ends of earth
amit