Since the rise of fracking, earthquakes have been driving people in other parts of the country into doorways and under desks and tables, thanks to the shoving of water and chemicals into the ground with enough pressure to decapitate a dinosaur from 18 miles away. Because we're running out of energy sources and [many more politically inflammatory comments about money, Big Oil, government, and why not throw in OPEC, too].
So, since people outside California (and sometimes Washington and Oregon, I guess) don't have the involuntary earthquake detection factor, it's shocking and nobody thinks to be prepared. Certainly not the people in Kansas and Oklahoma. Someone called 911 after his recliner moved eight inches across the floor.
Another resident reported that every ornament on her Christmas tree shook. This was on November 12. This is the real story: someone had her Christmas tree up and fully decorated by November 12. Is that a thing people do? Are we all supposed to have our trees up before Thanksgiving? I guess I'll start counting down to 2015 right now.