 It's pretty hard to pigeonhole. About half of the California quakes of five magnitude or more have foreshock. Oh, they do? Yeah, about half of them. Like that Long Beach quake in 1933, the day before there was about a 3.8. Loma Prieta had two quakes of over five magnitude, one the year before and one two months before. Interesting, too, I got a call from a fellow on Santa Cruz Mountains who got