I mentioned this to geologist-seismologist Leonardo "Nano" Seeber, who wrote some papers on the Salton Sea area cross faults and was co-author with Craig Nicholson on others in the 1980s. He suggested that someone quantify the changes in seismicity on some of these faults. I'd think that depth would also matter.....maybe right up Glen's alley? Working with Roger?

Speaking of Glen, where are you; I scroll down and see no posts from you/him

Chris