地震预警PGV-Pd关系参数的距离分段特征

刘辰, 李小军, 景冰冰, 席楠, 田秀丰. 2019. 地震预警PGV-Pd关系参数的距离分段特征. 地球物理学报, 62(4): 1413-1426, doi: 10.6038/cjg2019L0456
引用本文: 刘辰, 李小军, 景冰冰, 席楠, 田秀丰. 2019. 地震预警PGV-Pd关系参数的距离分段特征. 地球物理学报, 62(4): 1413-1426, doi: 10.6038/cjg2019L0456
LIU Chen, LI XiaoJun, JING BingBing, XI Nan, TIAN XiuFeng. 2019. The distance segmentation characters of PGV-Pd relationship parameters for earthquake early warning. Chinese Journal of Geophysics (in Chinese), 62(4): 1413-1426, doi: 10.6038/cjg2019L0456
Citation: LIU Chen, LI XiaoJun, JING BingBing, XI Nan, TIAN XiuFeng. 2019. The distance segmentation characters of PGV-Pd relationship parameters for earthquake early warning. Chinese Journal of Geophysics (in Chinese), 62(4): 1413-1426, doi: 10.6038/cjg2019L0456

地震预警PGV-Pd关系参数的距离分段特征

  • 基金项目:

    国家自然科学基金重点项目(U1434210),中央级公益性科研院所基本科研业务费专项(0416904),国家自然科学基金创新群体项目(51421005)资助

详细信息
    作者简介:

    刘辰, 男, 1988年生, 博士研究生, 主要从事地震预警方面的研究.E-mail:liuchenigcea@126.com

    通讯作者: 李小军, 男, 1965年生, 研究员, 博士生导师, 主要从事地震工程学和地震学等方面的研究.E-mail:beerli@vip.sina.com
  • 中图分类号: P315

The distance segmentation characters of PGV-Pd relationship parameters for earthquake early warning

More Information
  • 地震预警系统需要在破坏性的地震波到来前快速估算地震参数和地震动参数,以对可能出现的地震灾害进行预测,对重要工程、人员密集区域发布警报信息.以Pd估测PGV的方法是地震预警研究涉及的一种重要问题,该方法利用初至P波触发后前几秒的峰值位移(Pd)对最终地震动峰值速度(PGV)进行估算,以满足预警的需要.本文对2016年在日本发生的熊本地震及其前震、余震的震中距100 km以内、矩震级大于4级、井下基岩PGA>5 cm·s-2和地表PGA>20 cm·s-2的Kik-net强地震动记录进行处理分析,用于研究以Pd估测PGV的方法.将获得的强地震动数据按震中距从0~100 km平均划分为5个区段,在记录时间3~10 s范围内将Pd的计算取8个时间窗,分别对每个震中距区段、每一个Pd的时间窗下的PGV-Pd数据进行线性拟合,最终提出了一套应对不同震中距对位移幅值连续追踪测定PGV的算法.对每一个震中距区段的研究表明,震中距会对PGV-Pd关系产生影响.对5次地震进行验证分析,认为基于基岩记录估测基岩PGV的准确度高于基于地表记录估测地表PGV的准确度;对震中距进行分段的PGV估测方法准确度高于不考虑震中距因子的估测方法.最后拓展了将井下基岩Pd估测井下基岩PGV这种原地地震预警方法,使其能够为异地P波预警方法服务.

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  • 图 1 

    基岩地震动(A)及地表地震动(B)记录信息

    Figure 1. 

    Borehole (A) and surface (B) ground motion records information

    图 2 

    基于井下基岩地震动记录得到的PGV-Pd结果

    Figure 2. 

    PGV-Pd results from borehole records

    图 3 

    基于地震动记录得到的PGV-Pd结果

    Figure 3. 

    PGV-Pd results from surface records

    图 4 

    3 s时间窗下不同震中距分段的基岩PGV-Pd关系

    Figure 4. 

    The PGV-Pd relations from the time window width of 3s for the borehole data with different epicentral distance sections

    图 5 

    3 s时间窗下不同震中距分段的地表PGV-Pd关系

    Figure 5. 

    The PGV-Pd relations from the time window width of 3s for the surface data with different epicentral distance sections

    图 6 

    (a) 近年来不同统计关系式的对比;(b)不同震中距分段研究结果对比

    Figure 6. 

    (a) Contrast of different statistical relationships in recent years; (b) Comparison of subsection results from different epicentral distances

    图 7 

    3次震级小于6级地震的PGV估测结果(A)与PGV估测误差(B),真实PGV(圆)与估测PGV(叉)

    Figure 7. 

    PGV estimation results (A) and error (B) of the selected 3 earthquake with magnitude less than 6, real PGA (circle) and estimated PGA (fork)

    图 8 

    2016年10月21日M6.6地震的PGV估测结果(A)与PGV估测误差(B),真实PGV(圆)与估测PGV(叉)

    Figure 8. 

    PGV estimation results (A) and error (B) of the Oct 21, 2016 M6.6 earthquake, real PGA (circle) and estimated PGA (fork)

    图 9 

    2016年12月28日M6.3地震的PGV估测结果(A)与PGV估测误差(B),真实PGV(圆)与估测PGV(叉)

    Figure 9. 

    PGV estimation results (A) and error (B) of the Dec 28, 2016 M6.3 earthquake, real PGA (circle) and estimated PGA (fork)

    图 10 

    2016年12月28日M6.3地震IBRH14台站波形记录

    Figure 10. 

    Waveform records of IBRH14 stations at M6.3 earthquake on December 28, 2016

    图 11 

    5次检验用地震的震级估测结果

    Figure 11. 

    Magnitude estimation results of the 5 selected earthquake for real PGV estimate the magnitude of the circular, fork segments according to the epicentral distance for magnitude estimation results, no square epicentral distance segment magnitude estimation results

    图 12 

    用于震级预测的5次地震的分布与台站的分布

    Figure 12. 

    The distribution of the five earthquakes and the distribution of stations used for the magnitude prediction

    表 1 

    不同震中距分段和时间窗长情况下PGV-Pd关系(式(2))

    Table 1. 

    Statistical parameter of the PGV-Pd relation(equation (2)) in different epicentral distance sections and time window widths

    时间窗长 0~20 km基岩 0~20 km地表 20~40 km基岩 20~40 km地表 40~60 km基岩 40~60 km地表
    a b std a b std a b std a b std a b std a b std
    3 0.782 1.101 0.311 0.623 1.314 0.393 0.596 0.866 0.328 0.477 1.080 0.315 0.605 0.857 0.376 0.520 1.115 0.319
    4 0.778 1.022 0.291 0.728 1.409 0.329 0.616 0.807 0.326 0.523 1.115 0.294 0.627 0.877 0.339 0.540 1.137 0.290
    5 0.764 0.954 0.287 0.735 1.389 0.307 0.640 0.754 0.312 0.557 1.095 0.279 0.629 0.854 0.328 0.541 1.116 0.283
    6 0.750 0.910 0.279 0.714 1.343 0.300 0.674 0.727 0.248 0.557 1.024 0.255 0.670 0.880 0.309 0.569 1.115 0.281
    7 0.735 0.874 0.286 0.746 1.365 0.293 0.666 0.671 0.244 0.573 1.022 0.225 0.683 0.810 0.286 0.574 1.059 0.270
    8 0.721 0.839 0.287 0.749 1.358 0.277 0.656 0.635 0.241 0.558 0.985 0.230 0.694 0.738 0.280 0.588 0.992 0.272
    9 0.721 0.832 0.288 0.789 1.400 0.257 0.650 0.602 0.234 0.562 0.977 0.208 0.680 0.644 0.261 0.582 0.924 0.266
    10 0.721 0.829 0.284 0.785 1.394 0.258 0.635 0.560 0.223 0.553 0.952 0.207 0.687 0.618 0.248 0.577 0.884 0.260
    时间窗长 60~80 km基岩 60~80 km地表 80~100 km基岩 80~100 km地表 0~100 km基岩 0~100 km地表
    a b std a b std a b std a b std a b std a b std
    3 0.738 1.032 0.357 0.619 1.222 0.294 0.706 0.880 0.364 0.609 1.015 0.256 0.687 0.951 0.352 0.611 1.234 0.338
    4 0.735 0.988 0.327 0.607 1.164 0.275 0.705 0.839 0.334 0.601 0.968 0.239 0.693 0.907 0.325 0.642 1.247 0.304
    5 0.741 0.964 0.304 0.597 1.109 0.257 0.717 0.843 0.318 0.607 0.962 0.225 0.693 0.863 0.311 0.651 1.223 0.285
    6 0.707 0.855 0.278 0.569 1.023 0.240 0.712 0.809 0.303 0.587 0.898 0.219 0.697 0.826 0.285 0.641 1.165 0.272
    7 0.716 0.840 0.279 0.577 1.021 0.236 0.688 0.740 0.303 0.565 0.839 0.225 0.697 0.787 0.279 0.650 1.150 0.263
    8 0.747 0.857 0.276 0.606 1.037 0.234 0.682 0.704 0.299 0.557 0.809 0.225 0.701 0.758 0.276 0.657 1.128 0.259
    9 0.786 0.853 0.267 0.663 1.080 0.222 0.676 0.670 0.294 0.560 0.795 0.219 0.702 0.722 0.271 0.676 1.124 0.250
    10 0.790 0.786 0.257 0.665 1.026 0.215 0.682 0.644 0.289 0.569 0.778 0.222 0.703 0.688 0.267 0.676 1.094 0.255
    下载: 导出CSV

    表 2 

    用于验证地震动参数估测准确程度的5次地震的地震参数

    Table 2. 

    The seismic parameters of 5 earthquakes are used to verify the accuracy of seismic parameters estimation

    发震时间 纬度(°N) 经度(°E) 深度/km 震级M
    2016-12-28 21:38 36.72 140.57 011 km 6.3
    2016-10-21 14:07 35.38 133.85 011 km 6.6
    2016-06-16 14:21 41.95 140.99 011 km 5.3
    2015-06-04 04:34 43.49 144.06 000 km 5.0
    2016-02-06 10:25 33.73 134.37 011 km 5.1
    下载: 导出CSV
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出版历程
收稿日期:  2017-07-28
修回日期:  2019-02-27
上线日期:  2019-04-05

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