In 2010 and 2011 the city of Christchurch on New Zealand's South Island was heavily affected by a series of large earthquakes. The worst of these was the 22nd February earthquake that as well as causing some 185 deaths also severely damaged many buildings including the city's Victorian cathedral. Much of the damage was caused, not by the power of the earthquake which wasn't that large, but by the liquefaction of the ground that the city is built on.
Video explanation of liquefaction
Footage of liquefaction
To replace the cathedral that was built from stone, a new one has been constructed using cardboard as a light and cheap material to quickly give Christchurch an important step to recovery after such a devastating event.
BBC News story
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