Make that 33N to 35N, SAF and west. About this map and west to offshore areas:

pasadena.wr.usgs.gov/rece...17-34.html

Covers some of the same areas on other posts but this is a seperate symptom.

Maybe San Jacinto fault, Coyote Creek fault, not sure of the other names there. Anza, Borrego, up from there.