If you prefer to coordinate a geological inspection on your own, here are a few names of geologists which you can call:
(818) 416-4648 Cell
Certified Engineer Geologist #1238
CA License # CEG 1608
John A. LaRocca
Good luck with your purchase. I would recommend getting a geological inspection of the property and subsequent report as part of the inspection process. This will provide you with a detailed analysis of the soil under the property, as well as provide you with information on recent geological history of the surrounding area. It would definitely be in your best interest to do as a buyer. Hope this helps.
Have a nice evening...
Coldwell Banker Residential Brokerage
Sherman Oaks, CA
If you are south of the blvd in the hills you should absolutely do a geological survey, if you are in the flats, then you might want to see what your general inspector recommends. The inspector may see signs of structural or geological issues, or may not. I live in the area, in the flats, and haven't seen many issues, aside from mostly chimney's having problems after the 1994 earthquake. But your inspector will be able to guide you much better, as well as your realtor. Best of luck to you.