Earthquake: Christchurch 2011/What happens during a quake

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What is liquefaction?
When solid ground is shaken to mush By Isaac Davison NZ Herald article

Andrew Gee uses a wheelbarrow and cobblestones to demonstrate how liquefaction occurs. NZ Herald video

The Canterbury Earthquake of 2010
Some background about the 4 Sept 2010 Canterbury Plains earthquake

Aftershocks
GNS seismologist Bill Fry explains the February 2011 aftershocks in Christchurch to Julian Thomson. | Click here to watch the video.