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Audio, Radio New Zealand

Today: a month on from the Canterbury earthquake, we take a comprehensive look at the recovery process from the Garden City; we get a glimpse at the Commonwealth Games and; trauma affects police involved in the recovery of Carmen Thomas' body.

Audio, Radio New Zealand

Canterbury schools to stay closed until Monday, Earthquake family tries to comfort traumatised children, Christchurch welfare centres start filling up, Independent Australian MPs back Labor, Universities raise fees to maximum, MPs in Parliament pay tribute to people of Canterbury, Prime Minister speaks from Christchurch, and Julia Gillard speaks about the newly formed government.

Audio, Radio New Zealand

Christchurch Mayor Bob Parker, New standards for earthquake prone buildings in Christchurch, Some schools reopen, while others face permanent closure, PM says Defence Force's role to check CV, Plans to burn the Koran on hold not cancelled, Chances of magnitude aftershock hitting rapidly decreasing.

Images, eqnz.chch.2010

The tower on the Great Hall at the Arts Centre has recently been lowered to the ground for safety - and decorated for Christmas. It must be the most unusual Christmas tree ever.

Images, UC QuakeStudies

Photograph captioned by Fairfax, "Teeing off: Storeman Wayne Smith at the 12th hole of the Contact Wairakei Charity Golf Tournament for the Canterbury Earthquake Relief Fund. Held earlier this month, the tournament raised more than $8000 for the Canterbury Earthquake Relief Fund. In total more than $30,000 was raised for three charities at this year's annual tournament held at the Taupo Golf Club. As well as the $8200 raised for the Canterbury Earthquake Recovery Fund, two local charities Taupo Big Brother Big Sister and the Taupo Therapy Centre, each received $11,000 each from this year's fundraising effort".

Research papers, University of Canterbury Library

A team of earthquake geologists, seismologists and engineering seismologists from GNS Science, NIWA, University of Canterbury, and Victoria University of Wellington have collectively produced an update of the 2002 national probabilistic seismic hazard (PSH) model for New Zealand. The new model incorporates over 200 new onshore and offshore fault sources, and utilises newly developed New Zealand-based scaling relationships and methods for the parameterisation of the fault and subduction interface sources. The background seismicity model has also been updated to include new seismicity data, a new seismicity regionalisation, and improved methodology for calculation of the seismicity parameters. Background seismicity models allow for the occurrence of earthquakes away from the known fault sources, and are typically modelled as a grid of earthquake sources with rate parameters assigned from the historical seismicity catalogue. The Greendale Fault, which ruptured during the M7.1, 4 September 2010 Darfield earthquake, was unknown prior to the earthquake. However, the earthquake was to some extent accounted for in the PSH model. The maximum magnitude assumed in the background seismicity model for the area of the earthquake is 7.2 (larger than the Darfield event), but the location and geometry of the fault are not represented. Deaggregations of the PSH model for Christchurch at return periods of 500 years and above show that M7-7.5 fault and background source-derived earthquakes at distances less than 40 km are important contributors to the hazard. Therefore, earthquakes similar to the Darfield event feature prominently in the PSH model, even though the Greendale Fault was not an explicit model input.