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Earthquake Shake Test Absent Seismic Retrofitting:
This December 21 video shows a three-story apartment building without seismic retrofitting as it undergoes shaking equivalent to that of the 1994 Northridge, California earthquake.

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Earthquake Shake Test with Seismic Retrofitting:
This December 13 video shows a three-story apartment building which had been seismically retrofitted as it undergoes shaking equivalent to that of the 1994 Northridge, California earthquake.

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