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Originally posted by MoorfNZ
reply to post by muzzy
Great maps, thanks Muzzy.
I wonder if it's just coincidence that the vast majority of the quakes have occurred between the mighty Rakaia and Waimakariri rivers...
Originally posted by badw0lf
Sure not epic movie scale, but strike a light that's still hefty considering you just don't see it happen before in NZ.
Ol' mother earth is sure getting cranky with us...
Originally posted by MoorfNZ
Yes, it's officially Spring, but Sept snow showers aren't unusual down here in inland mid-Canterbury - short polar blasts! (Another passion of mine - snow!)
Originally posted by grantbeed
EDIT - not near as many aftershocks, although still a few jolts last night and this morning.
[edit on 5-9-2010 by grantbeed]
Casuative fault is an E-W (089 degrees) striking fault that has a maximum right-lateral offset of 4.6 metres and maximum vertical offset of 1 metre. NW-striking tensional cracks show some small (cm scale) left lateral offsets probably related to rotation of fault blocks within dextral shear zone. NE-striking fractures manifest as 'pop ups' indicating orthogonal shortening. Estimated surface rupture length of 22.3 km. Preliminary investigations suggest that the fault was not previously recognized as a major earthquake source because it resides under the Canterbury Plains and had no prior visible geomorphic expression. However, U Canterbury scientist Jarg Pettinga predicted the presence of such faults in a paper published 12 years ago. Fault possibly relates to southward propogation of the major ENE-striking Marlborough Fault system towards Christchurch, with this a relatively 'new' fault. Alternative is that it is an established 'blind' fault (no obvious prior surface trace). Fault occurred in the Pacific Plate related to build up of elastic strain associated with relative movement of the Australian and Pacific Plates.
Originally posted by Semoro
Canterbury was never thought to be seismically active, yet scientists have now discovered the network of faultlines passing under the city. At the moment we are waiting for the 6.1 aftershock as a rule of thumb, yet the media is now starting to cover the possibilities of a larger earthquake on the way. We cannot shower or drink the tap water due to contamination.
However, U Canterbury scientist Jarg Pettinga predicted the presence of such faults in a paper published 12 years ag
The quake was caused by the continuing collision between the Pacific and Australian tectonic plates, said Professor Mark Quigley, of Canterbury University.
‘One side of the Earth has lurched to the right ... up to 11ft and in some places been thrust up,’ he said. ‘We went and saw two houses that were completely snapped in half by the earthquake.’
Read more: www.dailymail.co.uk...