This confirms that while the Christchurch earthquake occurred with a time delay of 171 days and 42 km from the Darfield epicentre, this is not too unusual in global earthquake occurrences. For the prospective simulations the expected number of M≥ 6.0 earthquakes in 50 years is up to six times higher than for the EE model. This confirmed that although the M≥6.0 aftershocks in the Canterbury sequence occurred relatively far away from the main shock in space and time these differences were not unusual in global aftershock statistics. Of these large earthquakes, around 20% had a larger relative distance than Christchurch to Darfield, and around 15% occurred later than 171 days. Investigate how unusual late and large aftershocks are as observed in the Canterbury sequence. There was limited experience in dealing with the complexities of such an … In our best dataset, 2% of large earthquake fulfil these criteria. The Canterbury Earthquake Sequence (2010 – 2011) caused significant damage and loss of life in Christchurch, New Zealand. The most destructive of these was the 22 February 2011 earthquake, centered close to Christchurch, in which 185 people died. CANTERBURY EARTHQUAKE SEQUENCE Since the M w7.1 earthquake occurred on 4 September 2010, a sequence of significant earthquakes has struck the greater Christchurch region, as summarised in Table 1. PLEASE ENABLE JAVASCRIPT IN YOUR INTERNET OPTIONS. 185 people lost their lives, over 7000 were injured. 2 Executive Summary The Christchurch earthquake sequence has been on-going since September 4th 2010. Abstract. Many events in the 2010–2011 Canterbury Earthquake Sequence were sufficiently shallow and close to (or under) Christchurch to subject the city to very intense shaking (V: 1.7 g; H: 2.2 g). In the final analysis, it became clear that the most widespread and severe affects to infrastructure and land had been caused by repeated liquefaction events and the damage each one induced when millions of tonnes of silt and water spewed to the earth's surface. We identified further work required to better understand what effect the deficiencies of the real-time earthquake data have on the real‑time forecasting models. In the other dataset there were another couple of examples. Depending on the search criteria, between 6 and 13 % of main shocks in the more complete catalogue had 3 or more aftershocks within 1.1 magnitude units as observed in the Canterbury sequence. Between September 2010 and December 2011, NZ's second largest city (pop. How Professionals Have Helped to Prevent Recovery in Canterbury and Have Caused a Separate Disaster for Property Owners Adrian COWIE, New Zealand 1. The Canterbury earthquake sequence that began in September 2010 caused significant land movement that affected property boundaries and the survey control network throughout the region. The 2010 Canterbury earthquake (also known as the Darfield earthquake) struck the South Island of New Zealand with a moment magnitude of 7.1 at 4:35 am local time on 4 September, and had a maximum perceived intensity of X (Extreme) on the Mercalli intensity scale. This confirms that while the Christchurch earthquake occurred with a time delay of 171 days and 42 km from the Darfield epicentre, this is not unique in the context of global earthquake occurrences. 15,000 families lost their homes and 8,000 families were permanently displaced. 4 minutes to read . I would especially like to recognise the dedication of the team on the ground - they are doing a brilliant job. JP Morgan, Chase & Co ranked the CES as the third most costly earthquake event in history behind the 2011 Japanese subduction earthquake/tsunami and the 1994 Californian earthquakes. Depending on the search criteria, between 6 and 13 % of main shocks in the more complete catalogue had 3 or more aftershocks within 1.1 magnitude units, as observed in the Canterbury sequence. Canterbury Earthquake Sequence (2010-present) and examines communication learnings to create recommendations for improvements in implementation for these campaigns in future. EARTHQUAKE SEQUENCE A magnitude7.1 earthquake struck the Canterbury region of New Zealands South Island on September 4, 2010; the epicenter was located near the town of Darfield, approximately 35 kilometers west of Christchurch on the previously unknown Greendale fault. In the other dataset there were another couple of examples. We identified further work required to investigate the applicability of aftershock models on the time-scale of decades, which is due to begin soon. The Earthquake Commission received over 470,000 insurance claims. We also searched for large aftershocks within 1.1 magnitude units of the main shock that occurred at least as late and far away as the Christchurch earthquake relative to the Darfield earthquake. The 2010–2011 Canterbury earthquake sequence includes the 4 September 2010 Mw7.1 Darfield earthquake (e.g., Gledhill et al. The Canterbury earthquake sequence is an on-going earthquake sequence, which started with the M7.1 Darfield earthquake on 4 September 2010. If you'd like to access a paper that doesn't have a download, use the research paper request form to ask for a copy. Wellbeing recovery inequity following the 2010/2011 Canterbury earthquake sequence: repeated cross‐sectional studies. The memorial is a place to reflect on the 2010/2011 earthquakes that changed Greater Christchurch forever. EQC received over 470,000 claims, more than 15,000 families lost their homes, and repair costs were estimated at over $40 billion. This disaster has proven that in the worst of times, we see the best of New Zealand.”. The range of the fitted parameters exceeded what we would have expected from averaging global earthquake sequences. To investigate how unusual late and large aftershocks are (such as those observed in the Canterbury sequence) we used two global earthquake catalogues. Please get in touch. 6.3 magnitude earthquake part of aftershock sequence February the 22nd's devastating magnitude 6.3 earthquake centred southeast of Christchurch was part of the aftershock sequence that has been occurring since the September magnitude 7.1 quake near Darfield, 40km west of the city, an earthquake geologist said today. The Canterbury Earthquake Sequence – Recovery from Disaster. The Canterbury earthquake sequence has been a long-lived complex earthquake sequence, which started with the M7.1 Darfield earthquake on 4 September 2010. The sequence began in September 2010, followed by a significant aftershock in February 2011 that caused an unprecedented and sustained reduction in tourism arrivals to the city of Christchurch and the wider region. In space, the relative distance of Christchurch to the Darfield earthquakes was around the 80th percentile, and in time around the 85th percentile of all large aftershocks respective to their main shocks for the preferred search criteria. Jackson & Arizona are part of the generation of Christchurch children now know as 'the earthquake babies'. EQC acknowledged several times during this period that the scale … Police and volunteers worked to rescue people after Christchurch's earthquakes in 2011. We slightly changed focus from deriving aftershock parameters from the global catalogue, to aftershock modelling in the Canterbury sequence to provide bounds for earthquake rates in the Canterbury region for the coming years and decades. 380,000) was hit by four major earthquakes and thousands of aftershocks. The three M≥6.0 aftershocks included the devastating M6.3 Christchurch earthquake on 22 February 2011, which resulted in 185 deaths and extensive damage. The three M≥6.0 aftershocks included the devastating M6.3 Christchurch earthquake on 22 February 2011, which resulted in 185 deaths and extensive damage. * 10 km east of Waiau, Canterbury, New Zealand. Because … Since the earthquake, an Engineering Advisory Group has been assembled, now working under the Department of Building and Housing. A Christophersen, D A Rhoades, S Hainzl, E G C Smith. Latest earthquake is #25940 being magnitude 2.43 ( II) at 33.12 km at 12:10am, about 23 hr 8 mins ago. The repair and rebuilding of Canterbury continues and is expected to top $40 billion. Time-lapse visualisations of the February 22 2011 and September 4 2010 earthquakes and their aftershocks can also be viewed. We first illustrated the deficiency of the initial catalogue by comparing the GeoNet data downloaded in January 2012 with the mainly finalised catalogue in September 2012. Therefore a new time varying earthquake hazard model, the EE model, was developed. All four earthquakes caused lateral spreading to some degree; the most damaging earthquake occurred on 22 February 2011. Many of these research papers have PDF downloads available on the site. We also identified further work required to better understand what effect the deficiencies of the real-time earthquake data have on the real-time forecasting models. “On behalf of the Government and all New Zealanders, I would like to thank everyone from Tonkin and Taylor who pitched in and helped in the aftermath of the devastating Canterbury earthquake and continue to assist in the ongoing recovery. The Canterbury Earthquake National Memorial was opened to the public at the sixth anniversary commemoration event on 22 February 2017. Earthquake sequence unique to Canterbury 27 Nov, 2013 05:10 AM 4 minutes to read Police and volunteers worked to rescue people after Christchurch's earthquakes in 2011. Investigate how unusual late and large aftershocks are, as observed in the Canterbury sequence. We identified further work required to understand the time frame for which aftershock models can be usefully applied. In comparison, the EE model expects about 1.3 M≥6.0 earthquakes in about the same area and time. The authors report on, and summarise, the effects that the 2010-2011 Canterbury earthquake sequence had on the environment. On 4 September 2010, a powerful earthquake struck near Darfield in Canterbury. The retrospective simulations are consistent with the observations. In our most complete dataset and with the preferred search criteria, 2% of large earthquake fulfil these criteria. The 2010–2011 Canterbury Earthquake Sequence (CES), including the moment magnitude (M w) 7.1 Darfield earthquake and M w 6.2, 6.0, 5.9, and 5.8 aftershocks, occurred on a suite of previously unidentified, primarily blind, active faults in the eastern South Island of New Zealand. Earthquake sequence unique to Canterbury . 2011) and three subsequent earthquakes of Mw ≥ 5.9, most notably the 22 February 2011 Mw6.2 Christchurch earthquake (e.g., Kaiser et al. The first earthquake in September 2010 was the moment the ‘rubber hit the road’ for geotechnical engineer, Mike Jacka. We also fitted the Epidemic Type Aftershock Sequence (ETAS) model to the Canterbury sequence. Map showing recent earthquake activity in and around Christchurch, New Zealand. Managing the long and complex recovery from the Canterbury earthquake sequence has been a devastating learning curve for the New Zealand government and all its recovery partners. The probability for one or more M≥ 6.0 earthquakes in the 50 years starting in September 2012 ranges from 50% to 93% depending on the model. Some damaging aftershocks followed the main event, the strongest of which was a magnitude 6.3 shock known as the Christchurch earthquakethat occurred nearly six months later on 22 February 2011. Have a question or feedback? The Canterbury, New Zealand Earthquake Sequence I: The Mw 7.1 Darfield Earthquake of 3 September 2010 and Aftershock Sequence John Ristau GNS Science Lower Hutt, New Zealand Introduction On 4 September 2010 at 04:35 NZST (3 September 16:35 UTC) the moment magnitude (Mw) 7.1 Darfield earthquake occurred in the Canterbury region of New Zealand, … He had done his Master’s degree at Canterbury University in earthquake engineering, specifically, liquefaction potential for Christchurch. Kate was on the ground for Tonkin + Taylor mapping land damage and providing critical engineering advice for the Earthquake Commission and NZ Government from the first aftershock. In the early hours of Saturday morning, September 4, 2010 a strong, shallow earthquake struck Christchurch marking the start of the Canterbury Earthquake Sequence (CES). For each catalogue we identified magnitude thresholds and time periods for which the data can be expected to be complete. During our project we realised that many earthquakes in the first 24h following Darfield, including 14 in the magnitude band 5‑5.9, had not been reported in the initial GeoNet catalogue. The Pegasus Bay aftershock sequence is the most recent aftershock sequence of the 2010 September 3 UTC moment magnitude (M w) 7.1 Darfield earthquake in the Canterbury region of New Zealand.The Pegasus Bay aftershock sequence began on 2011 December 23 UTC with three events of M w 5.4–5.9 located in the offshore region of Pegasus … It began a series of earthquakes and aftershocks lasting till around 2016. We slightly changed focus from deriving aftershock parameters from the global catalogue, to modelling aftershocks in the Canterbury sequence to provide bounds for earthquake rates in the Canterbury region for the coming years and decades. The earthquake Due to on-going aftershock activity and the possibility of other triggered moderate to large earthquakes, the New Zealand National Seismic Hazard model was expected to grossly underestimate the level of ground shaking for the Canterbury region for the coming decades. The paper is special in many ways: more. 380,000) was hit by four major earthquakes and thousands of aftershocks. The 6.3-magnitude earthquake may have been an aftershock of the 7.1-magnitude 4 September 2010 Canterbury earthquake.New Zealand's GNS Science has stated that the earthquake was part of the aftershock sequence that has been occurring since the September magnitude-7.1 quake, however a seismologist from Geoscience Australia considers it a separate event given … Those shakes, collectively known as the Canterbury earthquake sequence, were the biggest insured event in New Zealand history and at the time the 4 th most expensive insured, global natural disaster to ever occur. 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