The crust is still trying to regain its equilibrium since the 7.1 magnitude September earthquake near Christchurch. Lateral spreading and its impacts in urban areas in the 2010–2011 Christchurch earthquakes. Large earthquakes may also occur on undetected faults that do not extend to the ground surface … _ a) Shallow focus b) deep focus . However, the fault segment that ruptured on 22 February 2011 … Share page. Three nearby accelerometers allow calibration between the geological expressions of liquefaction and the intensity of earthquake-induced surface ground motion at the site. An earthquake occurred in Christchurch on 22 February 2011 at 12:51 p.m. local time (23:51 21 February UTC) and registered 6.3 on the Richter scale. In the week before the February 22, 2011, quake, Step estimated a … The June 2011 Christchurch earthquake was a shallow magnitude 6.0 M w earthquake that occurred on 13 June 2011 at 14:20 NZST (02:20 UTC).It was centred at a depth of 7 km (4.3 mi), about 5 km (3 mi) south-east of Christchurch, which had previously been devastated by a magnitude 6.2 M W earthquake in February 2011. See more ideas about geology, sediment, earthquake. Causative faults (source areas) and magnitudes of the 2010-2011 Christchurch earthquakes (4 SEP 2010 EQ: red line = trace 1. earthquake can be expected on active faults in the Christchurch map area, resulting in local damage. First of all, tension builds up between tectonic plates as they collide or move past, or away from each other, these plates are driven by convection currents in the semi-molten layer below the crust. The epicentre of this earthquake was located close to the town of Darfield, approximately 40 km west of Christchurch. A (M) 6.3 earthquake (the Christchurch Earthquake) occurred on 22 February 2011. The BBC's Jonathan Amos looks at what caused the Christchurch earthquake and why it did more damage than last year's more powerful quake. Figures 7 and 8 show the areas of observed liquefaction in urban area of Christchurch after the 2010 Darfield earthquake and 2011 Christchurch earthquake, respectively. In 2010 and 2011, the city of Christchurch (New Zealand) was hit by a sequence of strong, local and devastating earthquakes. 2011 (Christchurch) earthquake were particularly intense and in many parts of Christchurch substantially above the ground motions used to design the buildings in Christchurch (Bradley and Cubrinovski, 2011). An aftershock sequence was initiated, which included a catastrophic M w 6.3 earthquake on 22 February 2011 beneath the city of Christchurch, killing 185 people. This most recent 6.3 magnitude earthquake is part of a series of aftershocks from the September event. Home » Science » Geology, Environment & Weather » 2011 Christchurch earthquake The February 2011 Christchurch quake was a compelling indigenous occasion that severely harmed New Zealand’s second-most vast city, executing 185 individuals in one of the country’s deadliest peacetime fiascos. 55, The 2010–2011 Canterbury earthquake sequence, pp. The 22 February 2011, M w 6.2-6.3 Christchurch earthquake is the most costly earthquake to affect New ... shell and peat) is the predominant surface geology layer in the eastern Christchurch area which outcrops up to 11 km west of the coast and has a thickness of approximately 40 m at the This varying geology, sometimes separated by only feet, is one of the reasons why liquefaction can be so variable. New Zealand Journal of Geology and Geophysics: Vol. Christchurch's Catholic cathedral damaged after the earthquake, in 2011. In 2010 and 2011, the city of Christchurch (New Zealand) was hit by a sequence of strong, local and devastating earthquakes. 255-269. Share. 2011 earthquake across a wide areas in suburbs north to south of Christchurch city. As the plates are grinding and scraping past each other, it breaks rocks and causes earthquakes like what we’ve seen. The (M w 6.2 Christchurch earthquake of February 2011: Preliminary report, submitted to New Zealand Journal of Geology and Geophysics, 2011). Photograph: David Wethey/EPA These were the seeds of what Smith hoped would become more of a … Figure 3 Distribution of recent historical seismicity in New Zealand (GNS, 2011) REGIONAL GEOLOGY AND GEOMORPHOLOGY In fact, in June 1869, a shallow earthquake of up to M5.8 was recorded under Christchurch, which caused damage to chimneys and masonry, and another possible M5.8 earthquake in 1870 occurred under nearby Lake Ellesmere. The geology of different parts of the country affects how seismic waves travel and where earthquakes are felt. Fig. Home » Science » Geology, Environment & Weather » 2011 Christchurch earthquake The February 2011 Christchurch quake was a compelling indigenous occasion that severely harmed New Zealand’s second-most vast city, executing 185 individuals in one of … The earthquake fault rupture in September began about 40 km west of Christchurch and ruptured for another 40 km heading off to the west, away from Christchurch, according to Dr Gibson. close. In the first week, the earthquake had generated more than 361 aftershocks the largest aftershock occurred only 2 hours after the main shock which had a magnitude of 5.9. Once again, cleanup of liquefaction had to be done in many of Christchurch’s eastern suburbs. barrell3, Continuous observational monitoring of a study site in eastern Christchurch, New Zealand, following the 2010 M w 7.1 Darfield earthquake has recorded ten distinct liquefaction episodes in the mainshock–aftershock sequence. The 22 February 2011 Christchurch earthquake was the most devastating causing 185 fatalities, collapse of two multi-storey reinforced concrete buildings, collapse or partial collapse of many unreinforced masonry buildings, and widespread and very … The Processes Of An Earthquake. ... 22 February 2011. Christchurch Earthquake Case Study. In the early hours of Saturday morning on 4 September 2010, people in Christchurch and the surrounding Canterbury region were jolted awake by the most damaging earthquake in New Zealand since the deadly magnitude 7.8 Hawke's Bay (Napier) earthquake in 1931.There was one important difference-this time there has been no loss of life. The reason why many scientists suggest that the 2011 Christchurch was an earthquake on its own is that it occurred on a different fault line to the 2010 Christchurch earthquake. Widespread and very severe liquefaction affected many of the city suburbs and its central business district. A moment magnitude (M w) 6.2 earthquake struck beneath the outer suburbs of Christchurch, New Zealand's second largest city, on 22 February 2011 local time.The Christchurch earthquake was the deadliest in New Zealand since the 1931 M w 7.8 Hawkes Bay earthquake and the most expensive in New Zealand's recorded history. The event increased the productivity of other aftershocks (Figure 1b). This is largely due to the earthquake taking place in the early hours of the morning when residents were in bed, and due to the distance of the earthquake from major urban areas. Measuring 6.3 on the Richter Scale and, at 4.99 km deep, the earthquake was very shallow. Christchurch Earthquake 2011. The earthquake occurred on New Zealand’s South Island, 10km west of Christchurch, at 12.51pm on 22nd February 2011 and lasted just 10 seconds. A (M) 6.3 earthquake (the Christchurch Earthquake) occurred on 22 February 2011. There is a Christchurch earthquake group on flickr, with a good collection of earthquake damage photos. Oct 14, 2018 - This is a visual compilation of liquefaction and other secondary deformation that is produced in saturated sediment by earthquakes. The Christchurch earthquake sequence began with a magnitude (M) 7.1 earthquake (the Darfield Earthquake) which occurred on 4 September 2010. These two maps were based on surface manifestation of Residents in Christchurch, New Zealand, have woken to a rattle, with a 4.3 magnitude earthquake shaking thousands across the region. 227 landslides caused by the 22 february 2011 christchurch earthqua k e and management of landslide risk in the immediate aftermath g. dellow1, m. yetton2, c. massey3, g. archibald3, d.j.a. There are many processes which form an earthquake and that occur during it. A case study of an earthquake in a HIC.. What caused the Christchurch earthquake? Vivienne BRYNER1,2, Richard NORRIS2, Jean FLEMING1 1The Centre for Science Communication, University of Otago, Dunedin, New Zealand; 2Geology Department, Unive… . Abstract. The Christchurch earthquake sequence began with a magnitude (M) 7.1 earthquake (the Darfield Earthquake) which occurred on 4 September 2010. In some cases, streets resealed only days prior, for the first time since the February 2011 earthquake were once again destroyed. The epicentre of this earthquake was located close to the town of Darfield, approximately 40 km west of Christchurch. These are analogues for deformation in Bonneville lake beds in Cache Valley at Green Canyon. (2012). 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