Mad science calculations: one step on the earthquake magnitude scale matches a 10^1.5× change in energy release, so 1 step is about 32× and 2 steps is 1000×.
If we want to dissipate the expected Big One in California (about an 8), presuming we get a Big One every century, we need a 7 every 3½ years, or a 6 every month, or a 5 every day, or a 4 every hour. (How? Drill for geothermal energy! It triggers earthquakes, just like fracking, and gets you carbon-neutral energy in the bargain.)
If it's a Big One in Japan, that's a 9, which means we need a 5 every hour or a 4 every 1½ minutes.
With magnitude 4 quakes happening that often, I expect buildings built anywhere near the fault line would have interesting new types of foundations to cut down on the shaking experienced. “I’ll be working from home today; I have a technician coming over to inspect my house’s shock absorbers.”