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Estimation of high-frequency seismic wave radiation on fault plane of 2008 Wenchuan earthquake based on improved empirical Green’s function

Author

Listed:
  • Deyu Yin

    (Huaiyin Institute of Technology)

  • Yun Dong

    (Huaiyin Institute of Technology)

  • Qifang Liu

    (University of Science and Technology)

  • Yadong Chen

    (Huaiyin Institute of Technology)

  • Yuexin She

    (Huaiyin Institute of Technology)

Abstract

A new strategy for inversion of high-frequency wave radiation condition on the fault plan is exhibited. One-dimensional source model of large earthquake was divided into subfaults, each subfault contains a series of subsources to express high-frequency wave radiation. Envelope of large earthquakes can be expressed as a root-mean-squared with combination of envelope attenuation relationship from all subsources. The envelope attenuation relationship is considered as the empirical Green’s function. Distribution of subsources is estimated by envelope inversion. According to this method, the high-frequency (> 1 Hz) wave radiation areas of 2008 Wenchuan earthquake are generally inverted by the differential evolution using acceleration data from 27 near-field stations, while acceleration waveforms of the Lushan earthquake from 43 near-field stations were utilized to create attenuation envelope. High-frequency waves radiated in: (1) surface rupture areas, including Yingxiu and Beichuan areas; (2) close to the boundaries of asperities near Yingxiu, Yuejiashan, Beichuan and Nanba areas; (3) within 30 km length near the fault northeastern tip; (4) around Qingchuan area.

Suggested Citation

  • Deyu Yin & Yun Dong & Qifang Liu & Yadong Chen & Yuexin She, 2020. "Estimation of high-frequency seismic wave radiation on fault plane of 2008 Wenchuan earthquake based on improved empirical Green’s function," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 104(1), pages 397-412, October.
    • Handle: RePEc:spr:nathaz:v:104:y:2020:i:1:d:10.1007_s11069-020-04174-7
    DOI: 10.1007/s11069-020-04174-7
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    References listed on IDEAS

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    1. Miaki Ishii & Peter M. Shearer & Heidi Houston & John E. Vidale, 2005. "Extent, duration and speed of the 2004 Sumatra–Andaman earthquake imaged by the Hi-Net array," Nature, Nature, vol. 435(7044), pages 933-936, June.
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