There are several in the area and you really can’t miss them. Until today they seemed to remain stationery, but when I flew over them just now they began to morph and “respawn”. But just for the record, here are the two that I recorded:
I have the same problem north and east of Los Angeles. To see it, all you have to do is spawn at KVCV (Southern California Logistics). There are terrain anomalies in all directions around the airport. I am very familiar with this area in the sim, because I do all my test flying of new aircraft from KVCV, and was once stationed at this airport in r/w when it was still George AFB. This issue definitely started with SU9 beta - it was fine before.
This issue is pretty much everywhere! I have it in Iran also and have reported it! Not sure what they did that caused so many terrain related spikes/issues… Hope they fix it.