Hi OT I have lived in So Ca for over thirty years and through many earthquakes. Some WAY TOO CLOSE and way too big - Northridge and Whittier. My dogs knew about the Whittier earthquake 30 seconds before I did, but were as surprised by Northridge quake as I was. Both were of similar distance from us and size. For the "little" quakes ( if there is such a thing) again only once have my dogs known first. For that one I am not sure I would have known we had one had not my dogs been anxious and the then the pool water started to move. Glad you are all fine. I have no idea why sometimes dogs "know" and sometimes they don't seem to "know".
Here in the Pac NW we some quakes.My dogs have never reacted to them. We had a good one a several years ago I think it was a 6. Payton did not even move! (Jordan was not born yet.) We had one last week a 4 something.Nothing from my dogs.
I wish my dogs would alert me to them. When Mt St.Helen's woke up again and we a slight ashing here again nothing.
My son was at Purdue last year when that quake happened about 5 in the morning. His cat woke him up. (We have hurricanes and flooding in New Orleans, but no earthquakes...yet)