I've now been through four earthquakes. Three of them, including the one I slept through, have been in the last year. (!)
I woke up just shy of 5:30 this morning, wondering why on earth one of the cats had chosen just that moment to do kitty yoga so vigorously that she was shaking the bed. She, however, was not on the bed. Her sister was, but she wasn't grooming. I thought, "Is this an earthquake...? It's going on too long to be a heavy truck going by... No, if it was an earthquake, the cats would be hiding under the bed..."
And I fell back to sleep. And dreamed about being in an earthquake.
Later, the alarm went off, the cats demanded breakfast, and I happened to turn on the news.
It was no dream! There was a mild earthquake. Details from the Associated Press, here; from the Seattle Times, here.
(The other earthquakes were on the East Coast, in 1986 (epicenter in Ohio); in Manchester, England, in February of 2008, which I slept through (epicenter in Lincolnshire); and Ann Arbor, MI, spring 08 (epicenter in Illinois).)