My mother was at home (western Carter Co. between Johnson City and Elizabehton) lying on the couch around 2 pm. She had just gotten her achy hip in a comfortable position. She noticed then that it felt like it was moving back and forth. She first thought it was the haying equipment in use next door vibrating the ground, but it didn't repeat. I told her I had heard of people with a "weather toe", but she was the first I ever heard of with a "seismic hip". Don Holt Johnson City, TN