Tuesday, December 18, 2012

Earthquake effect on our pendulums

 We live in the Ring of Fire, part of the North Pacific where volcanoes and earthquakes are quite common.

The other day we had a small 5.3 to 5.9 earthquake.

It was the third time we noticed one in the past 5 years.

video




And each time  we noticed them, it was either because the grandfather clock's pendulum was moving from front to back or (when over 4.5) the weights `themselves start to move.





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