Earthquakes, New Moon

I have this earthquake gadget on my browser, kind of neat.   After the big Indonesian earthquake, the number of 4.0 or bigger settled into a range of 60 to 80.   Big earthquake is big release of pent up energy, so you expect a drop.

However, using USGS data, the average number of 4.0 earthquakes since 1980 is 240 per week.    Very odd, we are now at around 120 to 140 per week.   No time to research this further, the concern is that after a massive release of energy, and even many of the aftershocks were 6.0 to 7.0 in Japan, there are still alot of earthquakes, maybe a major plate shift is underway, and will continue, perhaps yet another "big one".    The cost of preparation is acceptable.   The costs of being unprepared could be enormous.