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Images, eqnz.chch.2010

Steel frames are being used to shore the unstable facade of the St John the Baptist Church at Latimer Square while the building is being repaired and strengthened following the magnitude 7.1 earthquake that struck Christchurch on Saturday 4 September 2010.

Images, eqnz.chch.2010

Falling gable of the Anglican Community of the Sacred Name building left a gaping hole in the roof in the magnitude 7.1 earthquake that hit Christchurch on 4 September 2010. The chimney would have toppled as well had it not been braced.

Images, UC QuakeStudies

Photograph captioned by Fairfax, "Manning Intermediate pupils performing a powhiri to welcome Halswell School pupils onto the school. Halswell school was badly damaged in the September 7.1 earthquake. From left to right: Principals Bruce Topham (Halswell School) and Richard Chambers (Manning Intermediate) greet".

Images, UC QuakeStudies

Photograph captioned by Fairfax, "Manning Intermediate pupils (in white) performed a powhiri to welcome Halswell School pupils (in red) onto the school. Halswell School was badly damaged in the September 7.1 earthquake. Richard Chambers, Principal of Manning Intermediate (right, standing) welcomes Halswell School pupils".

Images, eqnz.chch.2010

It would have been a glorious Spring day in Christchurch had it not been for the magnitude 7.1 earthquake at 4:30 am. All the water and silt you can see covering the street in this photo erupted from the ground following the earthquake.

Images, eqnz.chch.2010

The ground slipped laterally at this previously unknown faultline across Highfield Road in mid-Canterbury, resulting in a relative displacement of at least 2 metres and the magnitude 7.1 earthquake on Saturday 4 September 2010. Note the now misaligned fence posts, hedge and road.

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.

Images, UC QuakeStudies

Photograph captioned by Fairfax, "Damage to St. Mary's Anglican Church Timaru resulting from 7.1 Magnitude Earthquake centred near Darfield. The last damaged spire-top is removed from the church tower, secured to the crane by St. Mary's parishioner Craig Perkins (obscured) and builder Kevin Deam".

Images, UC QuakeStudies

Photograph captioned by Fairfax, "Damage to St. Mary's Anglican Church Timaru resulting from 7.1 Magnitude Earthquake centred near Darfield . (L to R): Builder Kevin Deam and St. Mary's parishioner Craig Perkins are hoisted by crane to remove the last damaged spire from the church tower".

Images, UC QuakeStudies

Photograph captioned by Fairfax, "Damage to St. Mary's Anglican Church Timaru resulting from 7.1 Magnitude Earthquake centred near Darfield. (L to R): Builder Kevin Deam and St. Mary's parishioner Craig Perkins are hoisted by crane to remove the last damaged spire from the church tower".

Images, UC QuakeStudies

Photograph captioned by Fairfax, "Damage to St. Mary's Anglican Church Timaru resulting from 7.1 Magnitude Earthquake centred near Darfield . The final damaged spire is removed from the church tower by crane, secured by (L to R): St. Mary's parishioner Craig Perkins and builder Kevin Deam".