From the EQC site:
EQC has engaged Tonkin & Taylor to undertake a study to determine a method for predicting where liquefaction-related damage is likely to occur in future seismic events in Canterbury.
The main report (a technical document) is available on the EQC website here. A non-technical version of the report will be added to the website later.
The appendices, which include the maps to go with the report, will be available from the Tonkin & Taylor website soon.