Specifically heaviest smells showing up near Huntington Beach / Newport Beach + Costa Mesa California (just South of Los Angeles by a few miles).
The fire chief from Costa Mesa has now said the smell is coming from offshore – out to sea.
Gas and Oil pumping operations are miles away on platforms, and natural gas has no actual smell to it… only after processing and sale of natural gas do they actually add in the “smell” for human use.
If there are smells of rotten eggs coming in from offshore, then the smell most likely is hydrogen sulfide (magma / tectonic related).
The natural gas + oil operations could have punctured an area in the crust, which then could be releasing the hydrogen sulfide.
Worthy to note that MULTIPLE earthquakes struck California today at oil + gas pumping operations… and the USGS ignored most of them without reporting they even occurred.