Scary stuff. I've experienced 3 of them, 2 of which were in areas they were not experienced for many decades.
My first one was in Limburg, in 1992. A 4.8, followed by a 5.8.
The second one was in 2003 in Utah, where the people I stayed with were so surprised by it that their first thought was that Salt Lake City had been nuked.
My third one was in Denmark, 2008, our wedding day
Despite numerous visits to LA when my mum lived out there, the only Earthquakes I've felt were at home, Birmingham UK. I was only around 10 miles from the epicentre of one of them - word has it that the quake did millions of pounds worth of improvements to the area
sorry to hear about the quake, if you havent experienced one and not expecting it's some scary stuff.
This year I must have lived through thousands of earthquakes after that main one went off in Sendai in March. Had a small one yesterday actually. You feel a sway, you wait, hope it doesn't get worse, normally it doesn't - get back to work lol