Amplification and Liquefaction Animation (Educational) 

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Ampification and liquefaction of buildings on different bedrock.
Addresses the question, "How will 3 buildings, engineered equally, on different bedrock react to an earthquake? "
Highly generalized animation reflects the arrivals of P, S, and surface waves to 3 closely spaced buildings. Exaggerated movement of the buildings reflects the relative motion recorded by the seismograms. The 4th building on the beach shows the effect of liquefaction of underlying sediment. Animation ends with actual seismograms from buildings on solid bedrock and sediment fill equal distance from the 1989 Loma Prieta M7 earthquake.
Animation & graphics by Jenda Johnson, Earth Sciences Animated
Original music by Jesse Gay, Portland OR.