What type of fault is Greendale?
seismic fault
The Greendale Fault is an active seismic fault in the middle of New Zealand’s South Island….
| Greendale Fault | |
|---|---|
| Earthquakes | 2010 Canterbury earthquake |
| Type | seismic fault |
When did the Greendale Fault last rupture?
4 September 2010
Abstract. Rupture of the Greendale Fault during the 4 September 2010, M W7.1 Darfield (Canterbury) earthquake produced a zone of ground-surface rupture that severely damaged several houses, buildings and lifelines.
What fault line caused the Christchurch earthquake?
GNS Science stated that the earthquake arose from the rupture of an 8 km x 8 km fault running east-northeast at a depth of 1–2 km beneath the southern edge of the Avon-Heathcote Estuary and dipping southwards at an angle of about 65 degrees from the horizontal beneath the Port Hills.”
Why is New Zealand prone to earthquakes?
Earthquakes in New Zealand occur because we are located on the boundary of two of the world’s major tectonic plates – the Pacific Plate and the Australian Plate. These plates are colliding with huge force, causing one to slowly grind over, under or alongside the other.
Where is NZ fault line?
The Alpine Fault is a geological fault that runs almost the entire length of New Zealand’s South Island (c. 480 km) and forms the boundary between the Pacific Plate and the Indo-Australian Plate. The Southern Alps have been uplifted on the fault over the last 12 million years in a series of earthquakes.
What was the depth of the Darfield earthquake?
The earthquake is thus officially called the Darfield earthquake. The depth of the earthquake was relatively shallow, about 10 kilometres below the surface of the Canterbury Plains. Shallow earthquakes are usually much more damaging than deep ones.
Is there a fault line between Darfield and Sheffield?
That fault line passes about 6km south of the proposed dam site and under its head race. The Hororata fault between Darfield and Sheffield can be seen on the land surface because of the warping of alluvial plains, and other fault lines have been recognised between Darfield and Porters Pass.
Where are the fault lines in New Zealand?
Canterbury University scientists have said there are about 100 fault lines and fault segments around the region, rather than the half-dozen active faults that were known about 20 years ago. The closest known faults to Christchurch capable of generating powerful quakes are in the Rangiora-Cust area, near Hororata, and near Darfield.
How big was the fault in Christchurch in 2011?
The coloured image shows an “interference pattern” derived from X-band radar images taken on 19 and 23 February 2011 by the Italian Cosmo-SkyMed satellite. Each colour cycle represents 1.5 centimetres of ground displacement, so the total displacement between the western edge of the image and central Christchurch is about 25 centimetres.