The largest two earthquakes, magnitude (M) 7.1 on September 4th and the M 6.3 on February 22nd 2011 caused immediate and significant damage to the city of Christchurch. For each catalogue we identified magnitude thresholds and time periods for which the data can be expected to be complete. 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). 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. In the other dataset there were another couple of examples. The expected number ranged from 0.6 to 1.1, and totalled 2.3 for all sub sequences, which is an upper bound estimate due to the dependence of the events. Canterbury District Health Board (CDHB), Community and Public Health, New Zealand. 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. PLEASE ENABLE JAVASCRIPT IN YOUR INTERNET OPTIONS. The earthquake The paper is special in many ways: more. We identified further work required to understand the time frame for which aftershock models can be usefully applied. All of the earthquakes occurred on previously In comparison, the EE model expects about 1.3 M≥6.0 earthquakes in about the same area and time. 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. 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. It began a series of earthquakes and aftershocks lasting till around 2016. 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. The Earthquake Commission received over 470,000 insurance claims. 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. For each catalogue, we identified magnitude thresholds and time periods for which the data can be expected to be complete. I would especially like to recognise the dedication of the team on the ground - they are doing a brilliant job. The Canterbury earthquake sequence is an on-going earthquake sequence, which started with the M7.1 Darfield earthquake on 4 September 2010. Time-lapse visualisations of the February 22 2011 and September 4 2010 earthquakes and their aftershocks can also be viewed. November 3, 2014 | Christoph Grützner in Paper. 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). 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. 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. 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 research comes from an “insider” perspective from someone who worked on these campaigns in Canterbury before the earthquakes. * 10 km east of Waiau, Canterbury, New Zealand. This confirmed that the M≥6.0 aftershocks in the Canterbury sequence occurred relatively far away from the main shock in space and time but this is not too unusual in global aftershock statistics. 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 … EQC acknowledged several times during this period that the scale … INTRODUCTION Christchurch, New Zealand. The Canterbury earthquake sequence has been a long-lived complex earthquake sequence, which started with the M7.1 Darfield earthquake on 4 September 2010. A Christophersen, D A Rhoades, S Hainzl, E G C Smith. We then searched for earthquake sequences using different search criteria. Wellbeing recovery inequity following the 2010/2011 Canterbury earthquake sequence: repeated cross‐sectional studies. The first earthquake in September 2010 was the moment the ‘rubber hit the road’ for geotechnical engineer, Mike Jacka. 27 Nov, 2013 6:10pm . All four earthquakes caused lateral spreading to some degree; the most damaging earthquake occurred on 22 February 2011. 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, … 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. In the other dataset there were another couple of examples. New papers on paleoseismology, active tectonics and tsunami research. 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. 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