云南小江断裂带北段动态触发现象研究

杨晶琼, 李月芯, 运乃丹, 周仕勇, 杨宏峰, 杨周胜, 姚远. 2021. 云南小江断裂带北段动态触发现象研究. 地球物理学报, 64(9): 3207-3219, doi: 10.6038/cjg2021P0139
引用本文: 杨晶琼, 李月芯, 运乃丹, 周仕勇, 杨宏峰, 杨周胜, 姚远. 2021. 云南小江断裂带北段动态触发现象研究. 地球物理学报, 64(9): 3207-3219, doi: 10.6038/cjg2021P0139
YANG JingQiong, LI YueXin, YUN NaiDan, ZHOU ShiYong, YANG HongFeng, YANG ZhouSheng, YAO Yuan. 2021. Dynamic earthquake triggering in the north of Xiaojiang fault zone, Yunnan. Chinese Journal of Geophysics (in Chinese), 64(9): 3207-3219, doi: 10.6038/cjg2021P0139
Citation: YANG JingQiong, LI YueXin, YUN NaiDan, ZHOU ShiYong, YANG HongFeng, YANG ZhouSheng, YAO Yuan. 2021. Dynamic earthquake triggering in the north of Xiaojiang fault zone, Yunnan. Chinese Journal of Geophysics (in Chinese), 64(9): 3207-3219, doi: 10.6038/cjg2021P0139

云南小江断裂带北段动态触发现象研究

  • 基金项目:

    国家自然科学基金(42074046 & U2039204)资助

详细信息
    作者简介:

    杨晶琼, 女, 1968年生, 高级工程师, 主要从事数字地震资料分析与地震定位研究.E-mail: yjq6@163.com

    通讯作者: 运乃丹, 女, 1995年生, 在读硕士生, 主要从事地震资料处理和活动性研究.E-mail: yunnaidan@pku.edu.cn
  • 中图分类号: P315

Dynamic earthquake triggering in the north of Xiaojiang fault zone, Yunnan

More Information
  • 论文通过分析云南小江断裂北段(26°N—27.5°N,102.3°E—103.7°E)密集地震台阵(38个地震台组成)2012—2015年的地震记录,分别用基于频谱图的人工识别及小震目录的β统计两种触发判定标准研究远震是否对研究区域内小震活动存在动态触发.发现在研究时段内发生的36个7级以上远震中,7个存在着明显的触发现象.论文应用匹配定位法,实现了被触发小震的定位并计算了研究区域内触发潜能的分布,以及基于地震活动性变化的触发强度分布,讨论了小江断裂带北段断层应力所处状态及其对于强震危险性分析的启示.

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  • 图 1 

    小江断裂带及台站分布图

    Figure 1. 

    Xiaojiang Fault Zone and distribution of seismic stations

    图 2 

    强震目录分布图

    Figure 2. 

    Distribution of remote earthquakes

    图 3 

    (a) QJ35台站记录到的2014年4月3日MW7.7智利地震的切向分量的原始波形,时间窗为远震波到达时刻前1000 s与后6000 s; (b) 对(a)进行5 Hz高通滤波后的波形; (c) 图(a)中波形对应的频谱图, 标度尺的单位为10 log10(cm·s-1Hz-1)

    Figure 3. 

    (a) Raw tangential component seismogram of the April 3, 2014 MW7.7 Chile earthquake recorded by the QJ35 station, with the time window from 1000 s before to 6000 s after the teleseismic arrival; (b) 5 Hz high-pass-filtered waveform of (a); (c) Spectrogram of the raw data in (a). The unit of color bar is 10 log10(cm·s-1Hz-1)

    图 4 

    区域小震分布图

    Figure 4. 

    Distribution of local earthquakes

    图 5 

    远震的动态应力与震中距关系图

    Figure 5. 

    Epicentral distances and dynamic stresses of remote earthquakes

    图 6 

    台站触发潜能分布图

    Figure 6. 

    Spatial distribution of the triggering potential

    图 7 

    地区触发强度分布图

    Figure 7. 

    Spatial distribution of the triggering intensity

    表 附录 

    远震目录与触发信息

    发震时刻 纬度(°) 经度(°) 震源深度(km) 震级(MW) 震中距(km) 动态应力(kPa) 记录台站* β值(7000 s) β值(10 h) 触发类型
    2013 -02-06, 01:12:25.830 -10.799 165.114 24.00 8.00 7915 0.252 07, 13, 18, 20, 21, 22, 23, 25, 28, 29, 34 87.66 87.66 A
    2013 -02-08, 15:26:38.470 -10.928 166.018 21.00 7.10 7980 0.200 07, 13, 17, 18, 19, 20, 21, 22, 24, 25, 26, 28, 29, 34 2904 76.63 A
    2013 -04-16, 10:44:20.180 28.033 61.996 80.00 7.70 4039 1.602 07, 09, 11, 13, 17, 21, 23, 24, 25, 26, 27 50.72 0.447 A
    2013 -11-25, 06:27:33.300 -53.945 -55.003 11.78 7.00 16500 0.096 17, 19, 23, 24, 25, 26, 27, 29, 33 2.531 0.111 A
    2014 -04-01, 23:46:47.260 -19.610 -70.769 25.00 8.20 18985 1.234 07, 09, 16, 20, 23, 26, 30, 35 6.084 209.2 A
    2014 -04-03, 02:43:13.110 -20.571 -70.493 22.40 7.70 18985 0.456 07, 16, 20, 23, 24, 25, 26, 29, 30, 32, 35 2.048 0.211 A
    2014 -10-14, 03:51:34.460 12.526 -88.123 40.00 7.30 15485 0.235 02, 09, 13, 16, 18, 23, 25, 26, 27, 28, 29, 32, 33, 34, 35, 36 2.555 0.551 A
    2012 -03-20, 18:02:47.440 16.493 -98.231 20.00 7.40 14700 0.235 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 16, 17 0.553 -0.829 B
    2014 -04-11, 07:07:23.130 -6.586 155.049 60.53 7.10 6724 0.133 07, 16, 20, 23, 24, 25, 26, 27, 28, 29, 30, 32, 35 0.535 0.522 B
    2012 -04-11, 10:43:10.850 0.802 92.463 25.10 8.20 3088 10.887 01, 02, 05, 07, 09, 10, 12, 13, 16, 17 -0.72 -0.633 B
    2012 -11-07, 16:35:46.930 13.988 -91.895 24.00 7.40 15219 0.238 / 56631 / C
    2012 -12-07, 08:18:23.130 37.890 143.949 31.00 7.30 4012 2.488 18, 24 859.1 / C
    2013 -01-05, 08:58:19.330 55.393 -134.652 10.00 7.50 9393 1.929 / 269 / C
    2013 -04-06, 04:42:35.860 -3.517 138.476 66.00 7.00 5077 0.319 / 19.1 / C
    2012 -08-27, 04:37:19.430 12.139 -88.590 28.00 7.30 15522 0.158 / 6.798 / C
    2013 -08-30, 16:25:02.300 51.537 -175.230 29.00 7.00 7174 0.126 / 1493 / C
    2012 -09-05, 14:42:07.800 10.085 -85.315 35.00 7.60 15831 0.128 / 8.571 / C
    2013 -09-24, 11:29:47.970 26.951 65.501 15.00 7.70 3705 3.937 / 1190 / C
    2013 -09-25, 16:42:43.170 -15.839 -74.511 40.00 7.10 18755 0.135 / 1755 / C
    2013 -10-15, 00:12:32.050 9.880 124.117 19.04 7.10 2914 1.269 / 2147 / C
    2013 -10-25, 17:10:19.710 37.156 144.661 35.00 7.10 4067 1.281 / 25.14 / C
    2014 -04-18, 14:27:24.920 17.397 -100.972 24.00 7.20 14472 0.099 / 8563 / C
    2014 -06-23, 20:53:09.700 51.849 178.735 109.00 7.90 6751 1.723 / 20.36 / C
    2012 -03-25, 22:37:06.000 -35.200 -72.217 40.70 7.10 18970 0.065 / 0.611 / D
    2012 -04-11, 08:38:36.720 2.327 93.063 20.00 8.60 2907 19.393 02, 09 -0.737 / D
    2012 -04-12, 07:15:48.500 28.696 -113.104 13.00 7.00 12764 0.066 / 0.524 / D
    2012 -08-31, 12:47:33.380 10.811 126.638 28.00 7.60 3036 2.995 12 -0.699 / D
    2012 -10-28, 03:04:08.820 52.788 -132.101 14.00 7.80 9710 0.996 / 0.773 / D
    2013 -04-19, 03:05:52.650 46.221 150.788 110.00 7.20 4705 0.771 / / / D
    2013 -07-15, 14:03:39.880 -60.857 -25.070 11.00 7.30 14603 0.147 / / / D
    2013 -11-17, 09:04:55.530 -60.274 -46.401 10.00 7.70 15630 1.320 07, 20, 26, 35 0.509 / D
    2014 -04-12, 20:14:39.300 -11.270 162.148 22.56 7.60 7660 1.062 / -0.693 / D
    2014 -04-13, 12:36:19.230 -11.463 162.051 39.00 7.40 7663 0.378 / -0.112 / D
    2014 -04-19, 13:28:00.810 -6.755 155.024 43.37 7.50 6732 1.095 16, 20, 26, 31 -0.623 / D
    2014 -10-09, 02:14:31.440 24.000 -110.811 16.54 7.00 16718 0.141 / -0.822 / D
    2014 -11-15, 02:31:41.720 1.893 126.522 45.00 7.10 3739 0.771 / 0.218 / D
    注:*人工识别过程中在远震面波经过时间窗内挑选出区域地震的台站编号.
    下载: 导出CSV
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出版历程
收稿日期:  2021-02-27
修回日期:  2021-05-06
上线日期:  2021-09-10

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