Seismic behavior in central Taiwan : response to stress evolution following the 1999 Mw 7.6 Chi-Chi earthquake
Following the 1999 Mw 7.6 Chi-Chi earthquake, a large amount of seismicity occurred in the Nantou region of central Taiwan. Among the seismic activities, eight Mw ⩾ 5.8 earthquakes took place following the Chi-Chi earthquake, whereas only four earthquakes with comparable magnitudes took place from 1...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2014
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| Online Access: | https://hdl.handle.net/10356/104670 http://hdl.handle.net/10220/20263 |
| _version_ | 1811693021300785152 |
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| author | Wu, Yih-Min Chan, Chung-Han |
| author2 | Earth Observatory of Singapore |
| author_facet | Earth Observatory of Singapore Wu, Yih-Min Chan, Chung-Han |
| author_sort | Wu, Yih-Min |
| collection | NTU |
| description | Following the 1999 Mw 7.6 Chi-Chi earthquake, a large amount of seismicity occurred in the Nantou region of central Taiwan. Among the seismic activities, eight Mw ⩾ 5.8 earthquakes took place following the Chi-Chi earthquake, whereas only four earthquakes with comparable magnitudes took place from 1900 to 1998. Since the seismicity rate during the Chi-Chi postseismic period has never returned to the background level, such seismicity activation cannot simply be attributed to modified Omori’s Law decay. In this work, we attempted to associate seismic activities with stress evolution. Based on our work, it appears that the spatial distribution of the consequent seismicity can be associated with increasing coseismic stress. On the contrary, the stress changes imparted by the afterslip; lower crust–upper mantle viscoelastic relaxation; and sequent events resulted in a stress drop in most of the study region. Understanding seismogenic mechanisms in terms of stress evolution would be beneficial to seismic hazard mitigation. |
| first_indexed | 2024-10-01T06:45:03Z |
| format | Journal Article |
| id | ntu-10356/104670 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:45:03Z |
| publishDate | 2014 |
| record_format | dspace |
| spelling | ntu-10356/1046702020-09-26T21:34:03Z Seismic behavior in central Taiwan : response to stress evolution following the 1999 Mw 7.6 Chi-Chi earthquake Wu, Yih-Min Chan, Chung-Han Earth Observatory of Singapore DRNTU::Science::Geology::Volcanoes and earthquakes Following the 1999 Mw 7.6 Chi-Chi earthquake, a large amount of seismicity occurred in the Nantou region of central Taiwan. Among the seismic activities, eight Mw ⩾ 5.8 earthquakes took place following the Chi-Chi earthquake, whereas only four earthquakes with comparable magnitudes took place from 1900 to 1998. Since the seismicity rate during the Chi-Chi postseismic period has never returned to the background level, such seismicity activation cannot simply be attributed to modified Omori’s Law decay. In this work, we attempted to associate seismic activities with stress evolution. Based on our work, it appears that the spatial distribution of the consequent seismicity can be associated with increasing coseismic stress. On the contrary, the stress changes imparted by the afterslip; lower crust–upper mantle viscoelastic relaxation; and sequent events resulted in a stress drop in most of the study region. Understanding seismogenic mechanisms in terms of stress evolution would be beneficial to seismic hazard mitigation. Accepted version 2014-08-06T02:09:22Z 2019-12-06T21:37:19Z 2014-08-06T02:09:22Z 2019-12-06T21:37:19Z 2014 2014 Journal Article Chan, C. H., & Wu, Y. M. (2014). Seismic behavior in central Taiwan: Response to stress evolution following the 1999 Mw 7.6 Chi-Chi earthquake. Journal of Asian Earth Sciences, 90, 101-106. 1367-9120 https://hdl.handle.net/10356/104670 http://hdl.handle.net/10220/20263 10.1016/j.jseaes.2014.04.006 en Journal of Asian earth sciences © 2014 Elsevier Ltd. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of Asian Earth Sciences, Elsevier Ltd. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1016/j.jseaes.2014.04.006]. 6 p. application/pdf |
| spellingShingle | DRNTU::Science::Geology::Volcanoes and earthquakes Wu, Yih-Min Chan, Chung-Han Seismic behavior in central Taiwan : response to stress evolution following the 1999 Mw 7.6 Chi-Chi earthquake |
| title | Seismic behavior in central Taiwan : response to stress evolution following the 1999 Mw 7.6 Chi-Chi earthquake |
| title_full | Seismic behavior in central Taiwan : response to stress evolution following the 1999 Mw 7.6 Chi-Chi earthquake |
| title_fullStr | Seismic behavior in central Taiwan : response to stress evolution following the 1999 Mw 7.6 Chi-Chi earthquake |
| title_full_unstemmed | Seismic behavior in central Taiwan : response to stress evolution following the 1999 Mw 7.6 Chi-Chi earthquake |
| title_short | Seismic behavior in central Taiwan : response to stress evolution following the 1999 Mw 7.6 Chi-Chi earthquake |
| title_sort | seismic behavior in central taiwan response to stress evolution following the 1999 mw 7 6 chi chi earthquake |
| topic | DRNTU::Science::Geology::Volcanoes and earthquakes |
| url | https://hdl.handle.net/10356/104670 http://hdl.handle.net/10220/20263 |
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