I lived in the central valley in California for several years when I was a kid. We had one moderate (6-ish) earthquake when I was 5 or 6 years old. The water sloshing out of our pool is one of my earliest vivid memories.
I probably conveyed it earlier in this thread, but my memory of the 2011 quake is that I was on the 6th floor of an office building and the ceiling tiles started rattling with the initial waves. Then the S wave hit and the floor moved up and down, which was the very clear indicator of an earthquake and I got out real quick.