Application and evaluation of the 16 September 2015 Illapel, Chile <i>M</i><sub>w </sub>8.3 earthquake finite fault rupture model from numerical simulation

Shan Di; Wang Peitao; Ren Zhiyuan; Yuan Ye; Zhao Lianda; Fan Tingting; Wang Zongchen

doi:10.3969/j.issn.0253-4193.2017.11.005

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Shan Di, Wang Peitao, Ren Zhiyuan, Yuan Ye, Zhao Lianda, Fan Tingting, Wang Zongchen. Application and evaluation of the 16 September 2015 Illapel, Chile Mw 8.3 earthquake finite fault rupture model from numerical simulation[J]. Haiyang Xuebao, 2017, 39(11): 49-60. doi: 10.3969/j.issn.0253-4193.2017.11.005

Citation:

Shan Di, Wang Peitao, Ren Zhiyuan, Yuan Ye, Zhao Lianda, Fan Tingting, Wang Zongchen. Application and evaluation of the 16 September 2015 Illapel, Chile M_w8.3 earthquake finite fault rupture model from numerical simulation[J]. Haiyang Xuebao, 2017, 39(11): 49-60. doi: 10.3969/j.issn.0253-4193.2017.11.005

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Application and evaluation of the 16 September 2015 Illapel, Chile M_w8.3 earthquake finite fault rupture model from numerical simulation

doi: 10.3969/j.issn.0253-4193.2017.11.005

1.
National Marine Environmental Forecasting Center, Beijing 100081, China;Tsunami Warning Center, State Oceanic Administration, Beijing 100081, China
2.
National Marine Environmental Forecasting Center, Beijing 100081, China;Tsunami Warning Center, State Oceanic Administration, Beijing 100081, China;Key Laboratory of Research on Marine Hazards Forecasting, National Marine Environmental Forecasting Center, State Oceanic Administration, Beijing 100081, China

Received Date: 2016-08-04
Rev Recd Date: 2017-05-04

Abstract

Abstract

On September 16, 2015, at 19:54 (local time) a magnitude M_w 8.3 earthquake took place off the coast of central Chile, focal depth of 25 km. Meanwhile, the earthquake with rupture zone 200 km long and 100 km wide triggered moderate intensity teletsunami. The tsunami impacted approximately 700 km of the coast of Chile, some areas tsunami reached amplitudes near 5 m and tsunami run-up exceeded 13 m. Tsunami waves were subsequently recorded by more than 40 Deep-ocean Assessment and Reporting of Tsunami (DART) buoys in the Pacific Ocean and more than 200 tide gauges throughout the Pacific Ocean, a rich supply of data which study the tsunami propagation scenarios in near-filed and deep-water. This paper used the finite fault models and adaptive refinement algorithms to build a well computational efficiency and high resolution numerical tsunami model. We analyzed the teletsunami propagation characteristics. The results show that by using the established model can well reproduce the far-field and near-field tsunami process, especially on the near-field the simulation results fit well with the observational data. It indicates that the finite fault model can better depict the near-field, especially the rupture characteristics and provide more accurate source information. The fine prediction of tsunami propagation characteristics can be achieved by the finite fault model and high resolution numerical tsunami model. In this paper, using the observation data and simulation results, analyzed the frequency dispersion of the tsunami wave and its influence on the model. Meanwhile, carried out a brief summary of the typical characteristics of the tsunami wave. The wavelet analysis show that the tsunami energy is concentrated in the period band of around 10-50 min. These wave characteristics are not involved in the current tsunami warning information, but they are very important parameters. Further research on these characteristics will provide technical support for the improvement of tsunami warning information and warning products.
- finite fault,
- numerical simulation,
- earthquake tsunami,
- tsunami buoys,
- adaptive refinement algorithms

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References(32)

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