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2023年2月6日 2023年トルコ・シリア地震
(Mw7.5 2番目の地震)
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1.地震について (Earthquake Information)

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   2023/02/06,10:24:47 38.089 37.239 7.0 7.5
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Table1. Earthquake information. Origin time (UTC), Epicentral latitude, longitude, depth, and local magnitude from the left.(ref. AFAD catalog)


Fig.1. Event location.



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. Example of the velocity waveforms at the 4612 station (cm/s). The epicenter distance is about 70 km.

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.
Fig.7. The waveforms aligned from the epicenter estimated by the IPFx method.

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:
    Turkey Disaster and Emergency Management Authority (AFAD)の地震情報、波形記録 (https://tadas.afad.gov.tr/list-event)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