A short term seismic hazard assessment in christchurch, New Zealand, after the m 7.1, 4 September 2010 Darfield earthquake: An application of a smoothing kernel and rate-and-state friction model

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Title:	A short term seismic hazard assessment in christchurch, New Zealand, after the m 7.1, 4 September 2010 Darfield earthquake: An application of a smoothing kernel and rate-and-state friction model
Authors:	詹忠翰;Chan, Chung-Han;Wu, Yih-Min;Lin, Ting-Li
Contributors:	地球科學學院地球科學學系
Keywords:	Aftershocks;Christchurch;Coulomb stress change;Earthquake damage;Earthquakes;Friction;Geological hazards;Hazard assessment;Hazards;PSHA;Rate-and-state friction model;Seismic activity;Seismic hazard;Seismicity;Smoothing;Smoothing Kernel function;Time dependence
Date:	2012-04-01
Issue Date:	2026-04-23 11:26:55 (UTC+8)
Publisher:	Chinese Geoscience Union;Taiwan: 中華民國地球科學學會
Abstract:	摘要： The Mw 6.3, 21 February 2011 Christchurch, New Zealand, earthquake is regarded as an aftershock of the M 7.1, 4 September 2010 Darfield earthquake. However, it caused severe damage in the downtown Christchurch. Such a circumstance points out the importance of an aftershock sequence in seismic hazard evaluation and suggests the re-evaluation of a seismic hazard immediately after a large earthquake occurrence. For this purpose, we propose a probabilistic seismic hazard assessment (PSHA), which takes the disturbance of a short-term seismicity rate into account and can be easily applied in comparison with the classical PSHA. In our approach, the treatment of the background seismicity rate is the same as in the zoneless approach, which considers a bandwidth function as a smoothing Kernel in neighboring region of earthquakes. The rate-and-state friction model imparted by the Coulomb stress change of large earthquakes is used to calculate the fault-interaction-based disturbance in seismicity rate for PSHA. We apply this approach to evaluate the seismic hazard in Christchurch after the occurrence of the M 7.1, 4 September 2010 Darfield earthquake. Results show an increase of seismic hazards due to the stress increase in the region around the rupture plane, which extended to Christchurch. This provides a suitable basis for the application of a time-dependent PSHA using updating earthquake information. 出版者： Taiwan: 中華民國地球科學學會出版日期： 2012-04-01 出處： TAO : Terrestrial, atmospheric, and oceanic sciences, 2012-04, Vol.23 (2), p.231-236 資源來源： Chinese Electronic Periodical Services (CEPS) 版權： 2012. This work is licensed under https://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. 識別號： ISSN: 1017-0839 識別號： ISSN: 2223-8964 識別號： ISSN: 2311-7680 識別號： EISSN: 2311-7680 識別號： DOI: 10.3319/TAO.2011.09.23.02(T)
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