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2025年1月21日 台湾台南地方の地震 (ML6.4)
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1.地震について (Earthquake Information)

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   2025/01/20,16:17:27 23.231 120.57 35.7 9.7 6.4
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Table1. Earthquake information. Origin time, Epicentral latitude, longitude, depth, and JMA magnitude from the left.


Fig.1. Event location.

台湾中央気象署による地震情報： Earthquake Information

2.観測記録 (Observed Records)


Fig.2. Peak Ground Acceleration (left) and Peak Ground Velocity (right).


Fig.3. JMA shaking intensity.


Fig.4. The largest acceleration data at the station WTP.

3.解析結果 (Analytical Result)


Fig.5. Time history of the estimates for source parameters by the IPFx method. The horizontal axis shows the time of processing.
- upper left: error of epicenter against the final estimation
- upper right: JMA magnitude (black) and maximum estimated shaking intensity (red)
- lower left: epicenter depth
- lower right: automatic picking time (black) and theoretical arrival time (red)


Fig.6. Simulation of the IPFx method. The triangles show seismic stations, and colored triangles are triggered stations. The star shows the estimated location of an earthquake. The color of the samples is proportional to the likelihood of the hypocenter location.

References:
  • Yamada, M., K. Tamaribuchi, and S. Wu (2021). IPFx: Extended integrated particle filter method for achieving high-performance earthquake early warning system. Bulletin of the Seismological Society of America, 111(3), pp.1263-1272, https://doi.org/10.1785/0120210008, 2021.05. journal
  • Yamada, M. and J. Mori (2021). P-wave picking for earthquake early warning: Refinement of a Tpd method, Geophysical Journal International, ggab349, https://doi.org/10.1093/gji/ggab349, 2021.08. journal


    • Acknowledgements:
    台湾中央気象署の強震記録、P-alertの強震記録を利用しました。

    緊急地震速報を発表した地震の解析結果
    山田真澄　ホーム