"At this difficult time New Zealand deeply appreciates the thoughts and prayers of our friends and neighbours," Dr Austin said.
"On behalf of the Government and People of New Zealand, I would like to thank the Government and People of Tonga for their messages of support, offers of assistance and contributions to emergency appeals."
"The memorial service was a fitting and moving tribute. The High Commission is most grateful to those who organised it and those who contributed to a truly memorable occasion."
A condolence book has been opened at the High Commission on Taufa'ahau Road. It is open for public signature from 10-12 and 2-4 daily until Friday this week.
Prime Minister John Key has launched a global appeal for Christchurch. Donations may be made at www.christchurchearthquakeappeal.govt.nz
Further information is available at www.facebook.com/christchurchearthquakeappeal
Issued by the: New Zealand High Commission, Nuku'alofa, 2011.