Parker was the incumbent mayor at the time of the September 2010 Canterbury earthquake. During the days following the quake, he worked with Civil Defence, the police and the New Zealand Army to get the city back up and running. In October 2010, Christchurch band The Bats and many others played at a free earthquake relief concert in Hagley Park in front of about 140,000 people. Parker joined The Bats for the performance and played guitar.