I'm not anywhere near that area so I'll go from what I'm seeing on websites. So I might be wrong.
I'm not so sure about it being Intelsat 18 @180E
- the transponder on 10995 H 45000, if Lyngsat is correct, is on the South Pacific beam, that covers Aus/NZ and many western South Pacific Islands (including New Caledonia, which is what this service is for).
- you would scan in many encrypted channels, just like we do here on the East coast on its French Caribbean counterpart
- you would get other TPs listed in Lyngsat with some FTA french Polynesian channels from Tahiti as those do definitely cover the US West Coast
Instead I suspect that you might be receiving Yamal 300K @177W as its Northern beam covers most of the North Pacific from China to US/Canada, with strong coverage over Vancouver/Seattle but probably none over LA