More information is available at: http://global.shakemovie.princeton.edu/event.jsp?evid=C201212240754A. This video from Princeton Global ShakeMovie illustrates the up-and-down velocity of the earthquake. Strong blue waves indicate rapid downward surface movement, while strong red waves indicate strong upward motion. Researchers at Princeton investigate and inform the public about earthquakes worldwide through Global ShakeMovie, an online portal that shows near-real-time visualizations of recent earthquakes worldwide.

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