majority of buildings were made entirely from wood. The 1996-restored Government Buildings near Parliament is the largest wooden building in the Southern Hemisphere. While masonry and structural steel have subsequently been used in building construction, especially for office buildings, timber framing remains the primary structural component of almost all residential construction. Residents place their confidence in good building regulations, which became more stringent in the 20th century. Since the Canterbury earthquakes of 2010 and 2011, earthquake readiness has become even more of an issue, with buildings declared by Wellington City Council to be earthquake-prone, and the costs of meeting new standards. Every five years a year-long slow quake occurs beneath Wellington, stretching from Kapiti to the Marlborough Sounds. It was first measured in 2003, and reappeared in 2008 and 2013. It releases as much energy as a magnitude 7 quake, but as it happens slowly there is no damage. During July and August 2013 there were many earthquakes, mostly in Cook Strait near Seddon. The sequence started at 5:09 pm on Sunday 21 July 2013 when the magnitude 6.5 Seddon earthquake hit the city, but no tsunami report was confirmed nor any major damage. At 2:31 pm on Friday 16 August 2013 the Lake Grassmere earthquake struck, this time magnitude 6.6, but again no major damage occurred, though many buildings were evacuated. On Monday 20 January 2014 at 3:52 pm a rolling 6.2 magnitude earthquake struck the lower North Island 15 km east of Eketahuna and was felt in Wellington, but little damage was reported initially, except at Wellington Airport where one of the two giant eagle sculptures commemorating The Hobbit became detached from the ceiling. At two minutes after midnight on Monday 14 November 2016, the 7.8 magnitude Kaikoura earthquake, which was centred between Culverden and Kaikoura in the South Island, caused the Wellington CBD, Victoria University of Wellington, and the Wellington suburban rail network to be largely closed for the day to allow inspections. The earthquake damaged a considerable number of buildings, with 65% of the damage being in Wellington. Subsequently, a number of recent buildings were demolished rather than being rebuilt, often a decision made by the insurer. Two of the buildings demolished were about eleven years old – the seven-storey NZDF headquarters and Statistics House at Centreport on the waterfront. The docks were closed for several weeks after the earthquake. Relief Steep landforms shape and constrain