Rolleston/Burnham, South Island, NZ It's been a busy few weeks! Was away on geology fieldtrips all the previous two weeks, then on Saturday morning 4th September 2010 at 4.35 am we got woken in Westport to a reasonable but very long earthquake. My husband was back in Christchurch at the time and texted me saying "are you ok?". I replied, "yes!"...
Provides a map, the geological background, describes the effects, both in Christchurch and its surrounding areas, the damage to notable buildings, the financial exposure, the emergency response and relief efforts and the media coverage of the earthquake.
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The magnitude 7.1 Christchurch earthquake broke off an enormous chunk of Castle Rock in the Port Hills which has tumbled down towards the Lyttelton tunnel. View from Morgan's Valley (-43.578037° 172.714828°).
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The earthquake knocked over the bird bath.
Debra points at the beginnings of a sand volcano not long after the big earthquake.
On 4 September 2010, a magnitude Mw 7.1 earthquake struck the Canterbury region on the South Island of New Zealand. The epicentre of the earthquake was located in the Darfield area about 40 km west of the city of Christchurch. Extensive damage was inflicted to lifelines and residential houses due to widespread liquefaction and lateral spreading in areas close to major streams, rivers and wetlands throughout Christchurch and Kaiapoi. Unreinforced masonry buildings also suffered extensive damage throughout the region. Despite the severe damage to infrastructure and residential houses, fortunately, no deaths occurred and only two injuries were reported in this earthquake. From an engineering viewpoint, one may argue that the most significant aspects of the 2010 Darfield Earthquake were geotechnical in nature, with liquefaction and lateral spreading being the principal culprits for the inflicted damage. Following the earthquake, an intensive geotechnical reconnaissance was conducted to capture evidence and perishable data from this event. This paper summarizes the observations and preliminary findings from this early reconnaissance work.
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One of the many sand volcanos erupting from the ground after the Christchurch earthquake.
And, yes, the newspaper always gets through! The Press newspapers were delivered in our area of Hoon Hay in the hours after the earthquake.
(I righted the bird bath after the initial earthquake. None of the after-shocks were sufficient to knock it over again.)
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These were scattered across the park.
This one was really flowing out of the ground.
Robbie watches a sand volcano smother his driveway.
PDF slides from a presentation given by Dr. Thomas Wilson from the UC Geology department on 26 November 2010. The presentation was delivered at a public talk for the Rolleston community.
An usual thing to see coming from the ground in Hoon Hay, Christchurch.