Darfield Fault & Earthquake, 4 September 2010: fence, windbreak and road moved transversly ~3M out of alignment and vertically ~.6M

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Comments (3)

Ian Stehbens on April 28, 2011

Here there is both a vertical and a horizontal displacement along the fault. This quake has had a huge psychological impact upon the people of Christchurch and Canterbury, and has hit their economy hard too.

beegood on April 29, 2011


Ian Stehbens on April 29, 2011

Indeed, Maja. This rupture runs for 18kms at the surface, with another one parallel to it that is 8kms long at the surface...and as the epicentre was located 10kms deep (a shallow quake) ruptures like this one must be appreciated in the vertical dimension as well.

This quake was a sallow one and so damage at the surface was quite severe. Among it's multitude of aftershocks the February 22 quake has produced even more damage with resulting loss of life, partly because of the compromising of structures by this earlier quake, and partly because of the impact on Christchurch - its epicentre being just east of the city.

But just seeing the displacement in the alignment of straight roads, fences, ditches, water-races and windbreaks convinces one of the awesome power and the fragility of the earth's surface - which we commonly assume to be constant and solid.

Warmest regards, Maja.

vVvvvvvvIanvvvvVVvvv (The aftershocks stay in one's being for a long time.)

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Photo details

  • Uploaded on April 27, 2011
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    by Ian Stehbens