The former chair of Canterbury Regional Council says property developers may have ignored research showing the areas of Christchurch susceptible to liquefaction.
Sir Kerry Burke says building consent authorities may also have failed to consider the research when approving development proposals.
He says the research involved several hundred holes being drilled into the ground across Christchurch.
Sir Kerry says the council was then able to accurately map where liquefaction could occur.
He says the new Pegasus development, north of Christchurch, escaped earthquake damage because developers chose to compact the soil there to avoid liquefaction.