I was meditating a four evenings ago and saw 12 / 15 and I felt my chair shake.  Nothing in the house shook. My dog and cat were still asleep. My neighbors felt nothing. My chair sits soild on the floor. No short leg to cause a shake if I move.
Never have I felt or saw anything like this before.
I've done some looking around and found that there is a full moon on the 14th and the moon will be closest to the earth shortly after the time of the full moon.

I'm still disturbed by what I felt. We need no earthquakes with the problems going on in the world right now. I hope I mistook what I felt and saw.