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December 2011 Christchurch Earthquake
A major earthquake occurred in Christchurch on Tuesday 22 February 2011 at 12:51 p.m. local time (23:51 UTC, 21 February). The () earthquake struck the entire of the Canterbury region in the South Island, centred south-east of the central business district. It caused widespread damage across Christchurch, killing 185 people, in New Zealand's fifth-deadliest disaster. Christchurch's central city and eastern suburbs were badly affected, with damage to buildings and infrastructure already weakened by the magnitude 7.1 Canterbury earthquake of 4 September 2010 and its aftershocks. Significant liquefaction affected the eastern suburbs, producing around 400,000 tonnes of silt. The earthquake was felt across the South Island and parts of the lower and central North Island. While the initial quake only lasted for approximately 10 seconds, the damage was severe because of the location and shallowness of the earthquake's focus in relation to Christchurch as well as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Port Hills
The Port Hills are a range of hills in Canterbury Region, so named because they lie between the city of Christchurch and its port at Lyttelton. They are an eroded remnant of the Lyttelton volcano, which erupted millions of years ago. The hills start at Godley Head, run approximately east–west along the northern side of Lyttelton Harbour, and continue running to the south, dividing the city from the harbour. The range terminates near Gebbies Pass above the head of the harbour. The range includes a number of summits between 300 and 500 metres above sea level. The range is of significant geological, environmental and scenic importance. History The volcano is one of two from which Banks Peninsula was originally formed 12 million years ago. The area was first populated by Māori during the 14th century. During early European settlement some 500 years later the Port Hills presented a challenging barrier between the harbour and the planned settlement of Christchurch, their st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Soil Liquefaction
Soil liquefaction occurs when a cohesionless saturated or partially saturated soil substantially loses strength and stiffness in response to an applied stress such as shaking during an earthquake or other sudden change in stress condition, in which material that is ordinarily a solid behaves like a liquid. In soil mechanics, the term "liquefied" was first used by Allen Hazen in reference to the 1918 failure of the Calaveras Dam in California. He described the mechanism of flow liquefaction of the embankment dam as: The phenomenon is most often observed in saturated, loose (low density or uncompacted), sandy soils. This is because a loose sand has a tendency to compress when a load is applied. Dense sands, by contrast, tend to expand in volume or 'dilate'. If the soil is saturated by water, a condition that often exists when the soil is below the water table or sea level, then water fills the gaps between soil grains ('pore spaces'). In response to soil compressing, the po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2011 Canterbury Earthquake Intensity
Eleven or 11 may refer to: *11 (number), the natural number following 10 and preceding 12 * one of the years 11 BC, AD 11, 1911, 2011, or any year ending in 11 Literature * ''Eleven'' (novel), a 2006 novel by British author David Llewellyn *''Eleven'', a 1970 collection of short stories by Patricia Highsmith *''Eleven'', a 2004 children's novel in The Winnie Years by Lauren Myracle *''Eleven'', a 2008 children's novel by Patricia Reilly Giff *''Eleven'', a short story by Sandra Cisneros Music *Eleven (band), an American rock band * Eleven: A Music Company, an Australian record label * Up to eleven, an idiom from popular culture, coined in the movie ''This Is Spinal Tap'' Albums * ''11'' (The Smithereens album), 1989 * ''11'' (Ua album), 1996 * ''11'' (Bryan Adams album), 2008 * ''11'' (Sault album), 2022 * ''Eleven'' (Harry Connick, Jr. album), 1992 * ''Eleven'' (22-Pistepirkko album), 1998 * ''Eleven'' (Sugarcult album), 1999 * ''Eleven'' (B'z album), 2000 * ''Eleven'' (Ream ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earthquake Commission
The Earthquake Commission, ( mi, Kōmihana Rūwhenua), is a New Zealand Crown entity that invests in natural disaster research and education as well as providing natural disaster insurance to residential property owners. In March 2022, a bill was introduced to, among other changes, update the name of the Earthquake Commission to Toka Tū Ake – Natural Hazards Commission. It was established in its current form by the Earthquake Commission Act 1993, which was a continuation of the Earthquake and War Damage Commission, set up in 1945. It operates under the provisions of that EQC Act and of other relevant law, such as the Crown Entities Act 2004. Function of the Earthquake Commission The function of the EQC is defined in s5 of the EQC Act 1993. In short, this is to provide natural disaster insurance for residential property (contents, dwellings and land); to administer the Natural Disaster Fund; and to fund research and education on natural disasters and ways of reducing their ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Christchurch From Space, 4 March 2011, Showing Quake Shaking Strength, With Key
Christchurch ( ; mi, Ōtautahi) is the largest city in the South Island of New Zealand and the seat of the Canterbury Region. Christchurch lies on the South Island's east coast, just north of Banks Peninsula on Pegasus Bay. The Avon River / Ōtākaro flows through the centre of the city, with an urban park along its banks. The city's territorial authority population is people, and includes a number of smaller urban areas as well as rural areas. The population of the urban area is people. Christchurch is the second-largest city by urban area population in New Zealand, after Auckland. It is the major urban area of an emerging sub-region known informally as Greater Christchurch. Notable smaller urban areas within this sub-region include Rangiora and Kaiapoi in Waimakariri District, north of the Waimakariri River, and Rolleston and Lincoln in Selwyn District to the south. The first inhabitants migrated to the area sometime between 1000 and 1250 AD. They hunted moa, which led t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peak Ground Acceleration
Peak ground acceleration (PGA) is equal to the maximum ground acceleration that occurred during earthquake shaking at a location. PGA is equal to the amplitude of the largest absolute acceleration recorded on an wikt:accelerogram, accelerogram at a site during a particular earthquake. Earthquake shaking generally occurs in all three directions. Therefore, PGA is often split into the horizontal and vertical components. Horizontal PGAs are generally larger than those in the vertical direction but this is not always true, especially close to large earthquakes. PGA is an important parameter (also known as an intensity measure) for earthquake engineering, The design basis earthquake ground motion (DBEGM) is often defined in terms of PGA. Unlike the Richter magnitude scale, Richter and Moment magnitude scale, moment magnitude scales, it is not a measure of the total seismic scales#Magnitude and intensity, energy (magnitude, or size) of an earthquake, but rather of how hard the earth shake ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The New Zealand Herald
''The New Zealand Herald'' is a daily newspaper published in Auckland, New Zealand, owned by New Zealand Media and Entertainment, and considered a newspaper of record for New Zealand. It has the largest newspaper circulation of all newspapers in New Zealand, peaking at over 200,000 copies in 2006, although circulation of the daily ''Herald'' had declined to 100,073 copies on average by September 2019. Its main circulation area is the Auckland region. It is also delivered to much of the upper North Island including Northland, Waikato and King Country. History ''The New Zealand Herald'' was founded by William Chisholm Wilson, and first published on 13 November 1863. Wilson had been a partner with John Williamson in the ''New Zealander'', but left to start a rival daily newspaper as he saw a business opportunity with Auckland's rapidly growing population. He had also split with Williamson because Wilson supported the war against the Māori (which the ''Herald'' termed "the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epicentre
The epicenter, epicentre () or epicentrum in seismology is the point on the Earth's surface directly above a hypocenter or focus, the point where an earthquake or an underground explosion originates. Surface damage Before the instrumental period of earthquake observation, the epicenter was thought to be the location where the greatest damage occurred, but the subsurface fault rupture may be long and spread surface damage across the entire rupture zone. As an example, in the magnitude 7.9 Denali earthquake of 2002 in Alaska, the epicenter was at the western end of the rupture, but the greatest damage was about away at the eastern end. Focal depths of earthquakes occurring in continental crust mostly range from . Continental earthquakes below are rare whereas in subduction zone earthquakes can originate at depths deeper than . Epicentral distance During an earthquake, seismic waves propagate in all directions from the hypocenter. Seismic shadowing occurs on the opposite s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Christchurch Quake Cars, 2011-02-22
Christchurch ( ; mi, Ōtautahi) is the largest city in the South Island of New Zealand and the seat of the Canterbury Region. Christchurch lies on the South Island's east coast, just north of Banks Peninsula on Pegasus Bay. The Avon River / Ōtākaro flows through the centre of the city, with an urban park along its banks. The city's territorial authority population is people, and includes a number of smaller urban areas as well as rural areas. The population of the urban area is people. Christchurch is the second-largest city by urban area population in New Zealand, after Auckland. It is the major urban area of an emerging sub-region known informally as Greater Christchurch. Notable smaller urban areas within this sub-region include Rangiora and Kaiapoi in Waimakariri District, north of the Waimakariri River, and Rolleston and Lincoln in Selwyn District to the south. The first inhabitants migrated to the area sometime between 1000 and 1250 AD. They hunted moa, which led t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Press
''The Press'' is a daily newspaper published in Christchurch, New Zealand owned by media business Stuff Ltd. First published in 1861, the newspaper is the largest circulating daily in the South Island and publishes Monday to Saturday. One community newspaper—''Northern Outlook''- is also published by ''The Press'' and is free. The newspaper has won the title of New Zealand Newspaper of the Year (in its circulation category) three times: in 2006, 2007 and 2012. It has also won the overall Newspaper of the Year title twice: in 2006 and 2007. History James FitzGerald came to Lyttelton on the ''Charlotte Jane'' in December 1850, and was from January 1851 the first editor of the ''Lyttelton Times'', Canterbury's first newspaper. From 1853, he focussed on politics and withdrew from the ''Lyttelton Times''. After several years in England, he returned to Canterbury concerned about the proposed capital works programme of the provincial government, with his chief concern the pro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fault (geology)
In geology, a fault is a planar fracture or discontinuity in a volume of rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust result from the action of plate tectonic forces, with the largest forming the boundaries between the plates, such as the megathrust faults of subduction zones or transform faults. Energy release associated with rapid movement on active faults is the cause of most earthquakes. Faults may also displace slowly, by aseismic creep. A ''fault plane'' is the plane that represents the fracture surface of a fault. A ''fault trace'' or ''fault line'' is a place where the fault can be seen or mapped on the surface. A fault trace is also the line commonly plotted on geologic maps to represent a fault. A ''fault zone'' is a cluster of parallel faults. However, the term is also used for the zone of crushed rock along a single fault. Prolonged motion along closely spaced faults can blur the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geoscience Australia
Geoscience Australia is an agency of the Australian Government. It carries out geoscientific research. The agency is the government's technical adviser on all aspects of geoscience, and custodian of the geographic and geological data and knowledge of the nation. On a user pays basis it produces geospatial products such as topographic maps and satellite imagery. It is also a major contributor to the Australian Government's free, open data collections such as data.gov.au. Strategic priorities The agency has six strategic priority areas: # building Australia's resource wealth in order to maximise benefits from Australia's minerals and energy resources, now and into the future; # ensuring Australia's community safety so that Australian communities are more resilient to natural hazards; # securing Australia's water resources in order to optimise and sustain the use of Australia's water resources; # managing Australia's marine jurisdictions in order to maximise benefits from the s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
