Bells are Ringing

I love this brass Korean Temple Bell. It is about 12" tall at the dragon's head. It was a "parting" gift from one of your Dad's fellow workers when we left Okinawa in 1982. It is at home in an arrangement atop my china cabinet. Sometime in the early 90's, we were awakened in the middle of the night to the ringing of this bell. The vertical blinds started swaying and clicking and the bed began shaking. We both sat straight up and looked at each other with slightly scared and surprised looks on our faces. Earthquake !! In Nevada ?? We had not felt tremors here before !! The experience lasted only a few moments. We found out in the morning that the epicenter was across the border in California. That was the one and only time this bell rang of its own accord. A perfect emergency alert system !!