On February 28, 2001, a magnitude 6.8 earthquake, located some thirty miles below the surface of the earth and a few miles away from Olympia Washington, moved the ground for a bit more than half a minute. Damage was surprisingly light, due, in part, to structural retrofitting throughout the region, and also to the epicenter's depth.
A sand tracing pendulum, located at a shop in Port Townsend called Mind Over Matter (since moved to Sedona, Arizona), produced some
very interesting patterns.
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