5.3 4.9 near Yucaipa just minutes ago.
7.2 off the coast of Crescent City early yesterday morning.
5.2 near Anza Sunday morning.

Quakes measuring 5+ are fairly common. CA gets several each year.

Three in a week, aside from aftershocks, is unusual.

Of course, the craziest was probably the two unrelated 7+ 7.3 and 6.5 quakes in Landers and Big Bear that hit within hours of each other back in 1992.