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Implementation of a Real-Time System for Automatic Aftershock Forecasting in Japan

机译:日本自动余震预测实时系统的实施

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摘要

We present a prototype of a real-time system for automatic aftershock forecasting in Japan. Using real-time seismicity data from the High Sensitivity Seismograph Network of the National Research Institute for Earth Science and Disaster Resilience (NIED), the system automatically generates rapid aftershock forecasts. The system starts to issue a time-dependent forecast about 3 hrs after a mainshock and keeps updating it hourly. The forecast includes the estimated occurrence probabilities of earthquakes with magnitudes equal to or greater than a mainshock. Because an official procedure for aftershock forecasting in Japan does not provide aftershock probabilities in the first week after a large earthquake, this rapid response of the system after a mainshock can complement the existing procedure. We demonstrate the system's performance for the cases of three inland earthquakes that occurred after the establishment of the system in April 2017. We also discuss the potential usefulness of our procedure for forecasting large earthquakes by conducting a retrospective forecast test for the 2016 Kumamoto foreshock-mainshock-aftershock sequence based on the real-time seismicity data. Our monitoring system is useful for providing continuous timely information on time-dependent aftershock probabilities.
机译:我们为日本的自动余震预测提供了一个实时系统的原型。利用来自国家地球科学研究所的高灵敏度地震仪网络的实时地震性数据(NIED),系统自动生成快速余震预测。系统开始在主屏蔽后约3小时发出时间依赖预测,并保持每小时更新。预测包括地震的估计发生概率,其幅度等于或大于主轴。由于日本余震预测的官方程序不在大地震后的第一周内提供余震概率,因此在主屏蔽后,系统的快速响应可以补充现有程序。我们展示了系统在2017年4月建立系统后发生的三个内陆地震案件的表现。我们还通过对2016年熊本_主席进行回顾性预测测试,讨论了我们预测大地震预测的程序的潜在实用性 - 基于实时地震性数据的灌木序列。我们的监控系统可用于在时间依赖的余震概率提供连续的及时信息。

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  • 来源
    《Seismological research letters》 |2019年第1期|共9页
  • 作者单位

    Univ Tokyo Inst Ind Sci Meguro Ku 4-6-1 Komaba Tokyo 1538505 Japan;

    Inst Stat Math 10-3 Midori Cho Tachikawa Tokyo 1908562 Japan;

    Natl Res Inst Earth Sci &

    Disaster Resilience 3-1 Tennodai Tsukuba Ibaraki 3050006 Japan;

    Kyoto Univ Grad Sch Sci Dept Geophys Sakyo Ku Kitashirakawa Oiwake Cho Kyoto 6068502 Japan;

    Natl Res Inst Earth Sci &

    Disaster Resilience 3-1 Tennodai Tsukuba Ibaraki 3050006 Japan;

    Univ Tokyo Inst Ind Sci Meguro Ku 4-6-1 Komaba Tokyo 1538505 Japan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 地震学;
  • 关键词

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