Arsonists were responsible for 100 fires across Christchurch in March, including 19 in houses or other structures, Fire Service figures show.
Since September 2010 there have been 1264 deliberately lit fires.
Insurance Council chief executive Chris Ryan said fraud committed by desperate homeowners was behind the increase in deliberately lit fires.
"We have seen it, but not to a great extent ... They have not got enough insurance to cover earthquake damage, so they pick up more insurance when a fire happens soon after that."
Ryan said he was not aware of police charging anyone over an insurance fraud case relating to quake-damaged homes.
"It's really only anecdotal, but insurers are very much aware there is a degree of fraud, not just in Canterbury. It happens everywhere." The Press, 24 April
Credit: Porcupine Farm