FYI
This is way too stupid. In 1989 I worked in Los Gatos, just several miles as the crow flies from Loma Prieta. We had a major foreshock on August 4. It’s no guarantee, but I read in Wikipedia that USGS was concerned about this leading to a major quake, and had deployed additional sensors in the area. I don’t recall if there were any, but if people had been characterizing it as being a harbinger of a major quake, i.e., that one might be in the offing, that wouldn’t have surprised anyone. Full moon was on October 14, three days prior to the big quake. So, if there is a correlation, what the hell is it?