Photograph captioned by Fairfax, "Christchurch after its 7.1 magnitude earthquake at 0435 Saturday morning. Civil Defence have set up base at Christchurch Art Gallery".
Photograph captioned by Fairfax, "Prime Minister John Key visited Christchurch after its 7.1 magnitude earthquake at 0435 Saturday morning. Pictured with Mayor Bob Parker".
The 6.7 magnitude earthquake which struck Christchurch three years ago didn't just destroy large amounts of the city's infrastructure, it also had a profound effect on the natural environment.
At around 11-30pm there was a cluster of earthquakes - two over magnitude five, including one at 11.40 which registered 5.4, that's equal to the strongest aftershock felt on Saturday afternoon.
It's just over three weeks since a magnitude seven-point-one earthquake struck Canterbury, damaging infrastructure and destroying homes and businesses and the Earthquake Commission has already received over 75-thousand claims.
This study provides an initial examination of source parameter uncertainty in a New Zealand ground motion simulation model, by simulating multiple event realisations with perturbed source parameters. Small magnitude events in Canterbury have been selected for this study due to the small number of source input parameters, the wealth of recorded data, and the lack of appreciable off-fault non-linear effects. Which provides greater opportunity to identify systematic source, path and site effects, required to robustly investigate the causes of uncertainty.
Photograph captioned by Fairfax, "Christchurch recovers after a 6.3 magnitude earthquake at the start of the week causing mass death and destruction across the city".
Shag Rock, also known as Rapanui Rock, crumbled to a third of its original size after the magnitude 6.3 quake hit Christchurch 22 February 2011
A view after the 7.1 magnitude earthquake in Christchurch. Corner of Colombo and Battersea Streets. Given a bit of a HDR process to add "feeling".
Highlights from Radio New Zealand National's programmes for the week ending Friday 25th February . This week.......we have coverage of the 6.3 magnitude earthquake that hit Christchurch on Tuesday 22 Febraury.
A magnitude 6.2 earthquake was felt widely throughout the central New Zealand and as far south as Christchurch today. We spoke to people throughout the country, who described what impact the quake had on them.
Photograph captioned by Fairfax, "Prime Minister John Key visited Christchurch after it's 7.1 magnitude earthquake at 04:35 Saturday morning. Key, right, in the Civil Defence HQ".
Photograph captioned by Fairfax, "Prime Minister John Key visited Christchurch after its 7.1 magnitude earthquake at 04:35 Saturday morning. Mayor Bob Parker took the PM on a tour".
Photograph captioned by Fairfax, "St Paul's Presbyterian Church on Seddon Street, Timaru, which was damaged by the 7.1 magnitude earthquake centred near Darfield on 4 September".
Photograph captioned by Fairfax, "Christchurch scenes after the 7.1 magnitude earthquake. Benny Harwood, 10, on the raised bed of the creek that runs beside Porritt Park".
Cross cracks in the brick wall of St Elmo Courts apartment block at the Hereford Street / Montreal Street intersection.
This building at the Barbadoes Street / St Asaph Street intersection was so badly gamaged it had to be demolished.
Cross cracks in the brick wall of St Elmo Courts apartment block at the Hereford Street / Montreal Street intersection.
A view after the 7.1 magnitude earthquake in Christchurch. Community of the Sacred Name, cnr St Asaph and Barbadoes Streets, on St Asaph St looking east
After taking photos of the results of the 7.1 magnitude earthquake in Christchurch I turned around and saw this spectacular cloud formation - must be earthquake weather!
After the 7.1 magnitude earthquake in Christchurch 10 days ago we are reminded of Spring and that things are starting to look a little better now.
Using case studies from the 2010-2011 Canterbury, New Zealand earthquake sequence, this study assesses the accuracies of paleoliquefaction back-analysis methods and explores the challenges, techniques, and uncertainties associated with their application. While liquefaction-based back-analyses have been widely used to estimate the magnitudes of paleoearthquakes, their uncertain efficacies continue to significantly affect the computed seismic hazard in regions where they are relied upon. Accordingly, their performance is evaluated herein using liquefaction data from modern earthquakes with known magnitudes. It is shown that when the earthquake source location and mechanism are known, back-analysis methods are capable of accurately deriving seismic parameters from liquefaction evidence. However, because the source location and mechanism are often unknown in paleoseismic studies, and because accurate interpretation is shown to be more difficult in such cases, new analysis techniques are proposed herein. An objective parameter is proposed to geospatially assess the likelihood of any provisional source location, enabling an analyst to more accurately estimate the magnitude of a liquefaction-inducing paleoearthquake. This study demonstrates the application of back-analysis methods, provides insight into their potential accuracies, and provides a framework for performing paleoliquefaction analyses worldwide.
Photograph captioned by Fairfax, "A massive 7.4 magnitude earthquake has hit Christchurch and the wider South Island, causing widespread damage, two serious injuries and power cuts to most of the city".
Photograph captioned by Fairfax, "A massive 7.4 magnitude earthquake has hit Christchurch and the wider South Island, causing widespread damage, two serious injuries and power cuts to most of the city".
The Prime Minister prepares for the Christchurch Call Summit in Paris saying governments need to protect their citizens from radicalisation, Police investigate who sent a threatening letter to the Earthquake Commission, A powerful 7.5 magnitude quake strikes PNG overnight.
Photograph captioned by Fairfax, "St. Mary's Anglican Church in Timaru is cordoned off due to the risk of falling masonry after the 7.1 magnitude earthquake centered near Darfield".
Photograph captioned by Fairfax, "Damage to St. Mary's Anglican Church Timaru resulting from 7.1 Magnitude Earthquake centred near Darfield. The church tower is seen with the damaged spire tops removed".
Photograph captioned by Fairfax, "The pinnacle of the steeple of St. Joseph's Catholic Church in Temuka was displaced by the 7.1 magnitude earthquake that struck the Canterbury region the previous day".
Photograph captioned by Fairfax, "The pinnacle of the steeple of St. Joseph's Catholic Church in Temuka was displaced by the 7.1 magnitude earthquake that struck the Canterbury region the previous day".
Photograph captioned by Fairfax, "Damage to St. Mary's Anglican Church Timaru resulting from 7.1 Magnitude Earthquake centred near Darfield. Vicar Indrea Alexander looks up at the damaged church tower spires".