Cracks in the parapet discovered in 1991. It would imply that all faults were present when the earth was initially formed. Their modelling assumes there was a previously loaded fault just south of Christchurch and then calculates that the stress changes caused by the Darfield earthquake would have pushed it closer to failure. KeithW Keith, once more — thank you. Looking at the intensity maps of the September earthquake, the accelerations were actually quite modest in the eastern suburbs, but there was still extenive damage. Coming back to the Greendale and Port Hill Faults, my theory there is that north of the faults the land is moving west, and south of the fault it is not really going anywhere, But it gets a bit more complex than that, because its a bit like the front row of a rugby scrum, where there is plenty of buckling and twisting, and this can have somewhat unpredictable effects.
Which is why disaster experts recommend having and enough food and supplies to stay put for two weeks. So back in the December — February time frame, although we felt confident in explaining why there were more aftershocks in the Christchurch region, and we felt we knew why. The result could cause a very large earthquake that would probably be centred near Halswell. Hence the possibility of new volcanoes appearing in places like Auckland. The last fracture is widely believed to have been in 1717.
Or it could be one of the faults in the northern part of the South Island that is the next fracture. For 30 years, the owners and the council did nothing. It was a muniitions explosion at the Port Chicago Naval Magazine in Port Chicago, California on 17 July 1944 which killed 320 civilian and and Navy laborers. Christchurch versus Wellington When I was young, and indeed until recently, the conventional wisdom was that Wellington was the region of New Zealand with the highest earthquake risk. Towns such as Greymouth, Hokitika, Ross, Harihari and Whataroa, plus the Glacier Towns of Franz Josef and Fox, would probably take the greatest hits. There has been plenty of warped information going around so it is nice to read an article in easy to understand terms about what has happened and what is likely to happen scary as it may be. As the waves raced across the city, huge peak ground accelerations were recorded in southern and eastern parts, with vertical accelerations of more than twice that of gravity 2.
Parliament failed to require, the council failed to enforce, and the owners failed to reinforce - in 1982, in 1991, in 2005, after September 2010, and after December 2010. Rather, I see them as both being outcomes of a much bigger force. However, there may be additional subsidence as a result of ground compaction and liquefaction during the strong shaking. But small does not mean it was weak, even though the magnitude-6. Palos Verdes Fault Keeping goods moving through the Port of Los Angeles An offshore fault that mostly travels along the Orange County coast, the Palos Verdes Fault runs aground right through the Port of Los Angeles. Lyttleton harbour is a little bit wider than Akaroa harbour, as the original crater has had somewhat longer to erode. He will be left with a wrecked car! As for the Alpine Fault itself, when that goes it is likely to be of about magnitude 8.
And in the centre the two hookers pop up. With hindsight, building Christchurch in a swamp was not a very bright thing to do. He believes the two major fault lines around Christchurch have joined up. Possibly the worst place of all to be is Franz Josef, where I am told that a huge section of unstable rock has the potential to bury the town. The analysis used by the researchers relies on Coulomb Stress Triggering theory — an approach which assumes that after an earthquake, the stress does not dissipate but it propagates in the surrounding area, potentially increasing the occurrence of further earthquakes.
Dunedin is deifnitely somewhat further from the Alpine Fault than is Christchurch, so that is somewaht comforting. Dumbass's Hazim Al Umari not verified 25 June 2011 Well; I am an immigrant who started to know about Christchurch. I feel lucky to be alive in an age where many scientists before me and current ones who. Unlike the so called predictions many scared Christchurch residents are now petrified of, this is some what soothing for me to read. The fault rupture started with a small amount of slip between the two sides of the fault at about 6 km depth.
I don't think it is connected to the Alpine fault the one which causes the disruption on the West oast and which threatens Wellington I heard a scientific prediction when I was in ChCh after the Feb quake that all these new and small fault lines they were discovering would probably all move during this time - but that with every new movement the pressure is pushed East - so the next fault to move will be east of the currently moving fault. The stress increment on the Christchurch 22 Feb faults is ~0. Tectonics Here in New Zealand, we lie at the interface of the Pacific Plate and the Indo-Australian tectonic plates. Eastern sections of the city were built on a former swamp. The rupture began just before 12. The types of dip-slip faults are normal and reverse faults.
The Kaikoura Coast itself is presumably at even greater risk. But the very fact that these faults were unknown actually provides us with some information about them — namely, that although they are active, they have not been particularly active in the recent past. What I have seen recently, including following the Sept. A slightly smaller earthquake three days previous was at about 40km. A team of Italian Seismologists have analysed ground deformation data from a Japanese satellite to investigate how the 7.
The Alpine Fault In between these two zones lies the Alpine fault, which extends south from about Greymouth, and disappears into the Ocean about 12km north of Milford. Christchurch So how does the Alpine Fault explain the Christchurch earthquake of February 2011? Responsibility falls at the feet of the building owners, Parliament, and most of all the Christchurch City Council. Where one plate is riding up over another plate then cracks occur and this can allow magma to find its way thought the cracks to form volcanoes. The second one shows current elevation of the land. The other driver's insurance will pay for her own damages and maybe yours, but that will be a battle all by itself.