Researchers want to speak to anyone who saw cracks appear beside the Avon River or Courtenay Stream following the Canterbury quakes.
The Insurance Council says the video contained confusing information and a defamatory attack.
Tower Insurance chief executive shows frustration at Canterbury earthquake claim holdouts.
"Quake brain" is affecting Cantabrians' cognitive abilities, according to a new study.
The Red Cross has distributed $98 million in cash grants for earthquake recovery in Canterbury since 2010.