A pothole in a road surface, showing tyre marks where a vehicle has driven through the hole. The photographer comments, "After the earthquake in Christchurch in February 2011 burst underground pipes and liquefaction caused unseen hollows under the road surfaces. Occasionally after all the rest have been exposed by traffic someone would find 'discover' a new one".
A crack running through a tar-sealed surface.
Spray paint on the footpath to mark out the uneven surface.
A street sign and road cone near the Avon River saying "Uneven Surface".
A damaged house with cracks down the wall sits on an uneven surface.
Spray painted marks on the footpath outside the Casino indicating cracks and uneven surfaces.
Photograph captioned by Fairfax, "Extensive damage to the road surface in Raven Quay, Kaiapoi".
A large crack running through the surface of Bridge Street on the approach to the bridge.
Two road cones mark out an uneven surface on the road. The hole is filled with water.
People examine large cracks running through the surface of Bridge Street on the approach to the bridge.
A view down the Avon River in the city centre. A street sign marks out an uneven surface further down the street.
Photograph captioned by Fairfax, "Sam Bowen (9) explores the huge cracks in the road surface in Raven Quay, Kaiapoi".
A large crack running through the surface of Bridge Street on the approach to the bridge. In the background a man is photographing cracks in the road.
Photograph captioned by Fairfax, "Christchurch scenes after the 7.1 magnitude earthquake. The hockey surface at Porritt Park in Avondale/Wainoni".
A flow chart depicting potential hazards earthquakes pose to coastal geography.
Dried liquefaction silt in North New Brighton. The photographer comments, "Here you can see the very fine surface layer of liquefaction starting to shrink, crack and then curl up on itself".
Road damage and liquefaction in a residential street. The photographer comments, "A great gouge in the road caused by liquefaction undermining the road surface and a car driving over it. This was the earthquake in Christchurch, New Zealand on 22 February 2011".
Liquefaction in North New Brighton. The photographer comments, "This is the liquid part of liquefaction left when the heavier sand content has dropped down. After the double quake in Christchurch local to me I found these strange lines of bubbles on the surface".
Workers operate a drilling rig inside a Terra Probe truck, which has been raised on jacks to make it stable. The photographer comments, "Another completely different company testing what is below the surface to determine what type of foundations new houses will need. This is in one the blue/green area of earthquake shaken Christchurch. Strangely this is 3 metres away from where the other testing was done".
A digitally manipulated photograph of twisted reinforcing rods amongst the rubble from the demolition of QEII. The photographer comments, "These rarely seen worms live in the pressurised earth under the foundations of buildings. They need a damp soil and be under at least 100 pounds of pressure per square inch. After the destructive force of an earthquake they swiftly rise to the surface through gaps in the rubble. Unfortunately they quickly die and then crystallise as hard as iron in the dry low pressure air".