A video of the controlled explosion of a 40-tonne boulder above the Summit Road. The boulder is being removed using explosives after an assessment by United Research Services found that the rocks supporting the boulder have become unsafe.
A video about field trials conducted by the Department of Building and Housing at Queen Elizabeth II Park in Christchurch. Fifty kilograms of explosives are being used to simulate a magnitude-4 earthquake at a distance of 10 kilometres. The aim of the trials is to test soil-strengthening techniques that could be used to repair damaged land in Christchurch.