Moon tidal foece on earth

hi
please see the link fortidal force calculation
http://www.themcdonalds.net/richard/astro/papers/602-tides-web.pdf
please note the amount of tidal forces mentioned below.
1)Moon feels from Earth-------(1.82)*(10)raised to 18 N
2)Earth feels from Moon-------(6.69)*(10)raised to 18 N
3)Earth feels from Sun---------(3.02)*(10)raised to 18 N
please note that the tidal force of Moon on Earth is more (3.5times) than ,the force of Earth on Moon.This is because Earth is bigger and hence bigger differential force.
Now,the question is -
If we (scientists) agrees that the Moonquakes are mainly due to tidal force of Earth,How and why we do not believe that the Moon can trigger tidal force induced earthquakes(which is 3.5 times more)?
If any one have specifice reason ,please let me know
regards
Amit