Now many LA and many more California stations in general throw their night signals out into the Pacific in order to run more power.
The biggest change since the 60's in LA, Pacific-aimed signal wise, was KGBS becoming KTNQ and going from a daytimer to a 50 kw fulltime station.
When I was PD there in the mid-90's, we got many calls from Hawaii during the overnight talk show, and the show's host got to recognize some of them by their voice.
Others that have increased the night signal towards the Pacific include 830 from Orange County and 1150 (which shares a site with KTNQ).