Read the two columns above against each other. The energy stacks almost entirely into the top band — the handful of great quakes. The count stacks almost entirely into the bottom band — the thousands too small to feel. They are near-perfect mirror images: the quakes that do the damage are the ones you'd never notice on a list, and the quakes that fill the list do essentially nothing.
This is the magnitude scale doing its quiet trick. It is logarithmic in amplitude and steeper still in energy: a one-point rise is about 32× the energy released, a two-point rise about 1,000×. So an M7.8 doesn't outweigh an M5.8 by "two" — it outweighs it by a thousand of them. Lay every quake of the month end to end and the total is, to three figures, just the largest one.