There's actually some interesting visuals that illustrate this showing the difference in ground velocity between the two earthquakes : 2010 Quake: https://www

There's actually some interesting visuals that illustrate this showing the difference in ground velocity between the two earthquakes : 2010 Quake: https://www.youtube.com/watch?v=eA5m5PZ5p8E https://www.youtube.com/watch?v=eA5m5PZ5p8E 2011 Quake: https://www.youtube.com/watch?v=KJW7tkTwqXo https://www.youtube.com/watch?v=KJW7tkTwqXo And a good explanation vid: https://www.youtube.com/watch?v=aaA1nxYVi6k https://www.youtube.com/watch?v=aaA1nxYVi6k