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2022年2—3月中国大陆地区MS≥4.0地震震源机制解测定

梁姗姗 邹立晔 刘艳琼 张雪梅

梁姗姗, 邹立晔, 刘艳琼, 张雪梅. 2022年2—3月中国大陆地区MS≥4.0地震震源机制解测定[J]. 地震科学进展, 2022, (4): 183-189. doi: 10.19987/j.dzkxjz.2022-056
引用本文: 梁姗姗, 邹立晔, 刘艳琼, 张雪梅. 2022年2—3月中国大陆地区MS≥4.0地震震源机制解测定[J]. 地震科学进展, 2022, (4): 183-189. doi: 10.19987/j.dzkxjz.2022-056
Liang Shanshan, Zou Liye, Liu Yanqiong, Zhang Xuemei. Determination of the focal mechanism solutions of the earthquakes with MS≥4.0 occurred in the mainland of China during February to March 2022[J]. Progress in Earthquake Sciences, 2022, (4): 183-189. doi: 10.19987/j.dzkxjz.2022-056
Citation: Liang Shanshan, Zou Liye, Liu Yanqiong, Zhang Xuemei. Determination of the focal mechanism solutions of the earthquakes with MS≥4.0 occurred in the mainland of China during February to March 2022[J]. Progress in Earthquake Sciences, 2022, (4): 183-189. doi: 10.19987/j.dzkxjz.2022-056

2022年2—3月中国大陆地区MS≥4.0地震震源机制解测定

doi: 10.19987/j.dzkxjz.2022-056
基金项目: 中国地震局常规性项目“测震学科技术管理组运维”资助
详细信息
    通讯作者:

    梁姗姗(1989-),女,高级工程师,主要从事地震定位和震源机制相关研究。E-mail:liangshanshan@seis.ac.cn

  • 中图分类号: P315.3+3

Determination of the focal mechanism solutions of the earthquakes with MS≥4.0 occurred in the mainland of China during February to March 2022

  • 摘要: 本文利用中国地震台网记录的宽频带波形资料,采用近震全波形反演方法得到2022年2月1日—3月31日发生在中国大陆地区的MS≥4.0共20次地震的震源机制解。结果显示逆断型5次,走滑型14次,未知型1次。

     

  • 图  1  20次MS≥4.0以上地震震中位置和所用台站分布,子图为德令哈地震序列位置

    Figure  1.  Map of the epicenters of the 20 earthquakes with MS≥4.0 and the distribution of the used stations,and the inset shows the location of Delingha earthquake sequence

    图  2  2022年3月26日青海德令哈MS6.0 (MW5.7)地震震源机制解反演

    (a)波形相关系数随反演深度分布,彩色条棒表示偏量矩张量反演时双力偶分量所占比例;(b)本文所得震源机制解对应的三分量理论(红色)和实际(黑色)波形对比图。图中右侧字符表示台站代码,波形上方数字为方差减少量值,代表波形拟合程度

    Figure  2.  Focal mechanism inversion of Qinghai Delingha MS6.0 (MW5.7) earthquake on March 26, 2022

    (a) Correlation between observed and synthetic waveforms versus depth, the colored-bar shows double couple percentage using ISOLA in deviatoric mode; (b) Comparison of the three-component theoretical (red) and observational (black) waveforms corresponding to focal mechanism solutions obtained in this paper. The station codes are plotted on the right of figure, the numbers above the waveforms are variance reduction, which indicate the fitting degree of waveform

    图  4  2022年2—3月中国大陆地区MS≥4.0地震类型图解

    Figure  4.  The ternary diagram of the focal mechanisms in the mainland of China during February to March 2022

    图  3  本文所得震源机制解,子图为德令哈地震序列

    Figure  3.  The focal mechanism solutions obtained in this paper,and the submap shows the Delingha earthquake sequence

    图  5  2022年3月26日德令哈MS6.0地震序列精定位结果

    Figure  5.  Relocation results of the Delingha earthquake sequence

    表  1  2022年2—3月中国大陆地区MS≥4.0地震基本参数

    Table  1.   Events list of the earthquakes with MS≥4.0 in the mainland of China

    序号发震时刻(BJT)北纬
    东经
    深度
    /km
    震级(MS参考地名
    12022-02-01 06:01:28.531.91104.27104.0四川绵阳市北川县
    22022-02-02 07:13:09.433.2095.05114.1青海玉树州杂多县
    32022-02-10 04:11:29.235.5688.07174.0西藏那曲市双湖县
    42022-02-10 15:36:38.025.56100.04124.1云南大理州大理市
    52022-02-18 05:12:15.638.6890.69104.3新疆巴音郭楞州若羌县
    62022-02-22 10:40:14.340.9983.13124.1新疆阿克苏地区沙雅县
    72022-02-28 03:52:16.941.8788.12104.6新疆巴音郭楞州和硕县
    82022-03-01 03:54:11.539.3779.24104.3新疆喀什地区巴楚县
    92022-03-02 08:18:45.535.7495.8794.8青海海西州都兰县
    102022-03-05 22:43:03.122.34101.6564.5云南普洱市江城县
    112022-03-07 22:35:25.737.73101.4494.2青海海北州门源县
    122022-03-14 02:28:48.622.51115.04254.1广东惠州市惠东县海域
    132022-03-16 02:44:35.245.25124.75104.3吉林松原市宁江区
    142022-03-17 08:26:03.039.0297.6695.1甘肃张掖市肃南县
    152022-03-17 21:41:18.536.1077.86105.2新疆和田地区皮山县
    162022-03-26 00:21:02.238.5097.33106.0青海海西州德令哈市
    172022-03-26 00:28:40.538.4797.34104.3青海海西州德令哈市
    182022-03-26 01:05:08.138.5197.34104.1青海海西州德令哈市
    192022-03-26 02:50:03.738.4797.37104.9青海海西州德令哈市
    202022-03-29 05:25:09.430.03103.41104.3四川眉山市丹棱县
    下载: 导出CSV

    表  2  2022年2—3月中国大陆地区MS≥4.0地震的震源机制结果

    Table  2.   Focal mechanisms of the earthquakes with MS≥4.0 in the mainland of China

    序号发震时刻(BJT)节面Ⅰ 节面Ⅱ P T 矩心
    深度
    /km
    矩震级
    MW
    VRCN图示
    走向
    倾角
    滑动角
    走向
    倾角
    滑动角
    方位角
    仰角
    方位角
    仰角
    12022-02-01
    06:01:28.5
    1155891 2933288 20413 2977194.10.792.0
    22022-02-02
    07:13:09.4
    7643−1017483−13347372962654.30.723.7
    32022-02-10
    04:11:29.2
    332861745384482277774.40.722.6
    42022-02-10
    15:36:38.0
    14371−1654876−1952397384.20.771.9
    52022-02-18
    05:12:15.6
    865210224739751687437854.50.564.7
    62022-02-22
    10:40:14.3
    28373171887416323601462464.20.591.6
    72022-02-28
    03:52:16.9
    16659923413186254148276154.30.652.7
    82022-03-01
    03:54:11.5
    60603731059144185127646164.10.542.3
    92022-03-02
    08:18:45.5
    27057−271568−14423641140764.90.782.8
    102022-03-05
    22:43:03.1
    32184176518661861276764.50.952.5
    112022-03-07
    22:35:25.7
    22248174316854282241883244.50.725.6
    122022-03-14
    02:28:48.6
    5884−16932779−6283121923214.00.762.2
    132022-03-16
    02:44:35.2
    2127417130581167851701874.20.733.1
    142022-03-17
    08:26:03.0
    34681168787993223021594.80.752.7
    152022-03-17
    21:41:18.5
    109686633832135216203446065.00.804.2
    162022-03-26
    00:21:02.2
    17577−1628072−133822307395.70.812.5
    172022-03-26
    00:28:40.5
    8468−3318760−1544339137584.70.643.1
    182022-03-26
    01:05:08.1
    17270−1707881−2133211268104.50.701.8
    192022-03-26
    02:50:03.7
    8552−918083−14150323072184.70.705.9
    202022-03-29
    05:25:09.4
    2017416529576166811582144.20.892.2
    下载: 导出CSV
  • [1] 梁姗姗,邹立晔,刘艳琼,等. 2021年12月中国大陆地区M≥4.0地震震源机制解测定[J]. 地震科学进展,2022,52(1):40-44

    Liang S S,Zou L Y,Liu Y Q,et al. Determination the focal mechanism solutions of earthquakes with M≥4.0 occurred in the mainland of China in December 2021[J]. Progress in Earthquake Sciences,2022,52(1):40-44
    [2] 梁姗姗,邹立晔,刘艳琼,等. 2022 年 1 月中国大陆地区 MS≥4.0 地震震源机制解测定[J]. 地震科学进展,2022,52(2):89-94

    Liang S S,Zou L Y,Liu Y Q,et al. Determination of the focal mechanism solutions of the earthquakes with MS≥4.0 occurred in the mainland of China in January 2022[J]. Progress in Earthquake Sciences,2022,52(2):89-94
    [3] Sokos E N,Zahradnik J. ISOLA a Fortran code and a Matlab GUI to perform multiple-point source inversion of seismic data[J]. Computers and Geosciences,2008,34(8):967-977 doi: 10.1016/j.cageo.2007.07.005
    [4] Sokos E,Zahradnik J. Evaluating centroid-moment-tensor uncertainty in the new version of ISOLA software[J]. Seismological Research Letters,2013,84(4):656-665 doi: 10.1785/0220130002
    [5] Bassin C G L,Laske G,Masters G. The current limits of resolution for surface wave tomography in North America[J]. Eos Transactions American Geophysical Union,2000,81(48):F897
    [6] Kennett B L N,Kerry N J. Seismic waves in a stratified half space[J]. Geophysical Journal International,1979,57(3):557-583 doi: 10.1111/j.1365-246X.1979.tb06779.x
    [7] Bouchon M. A simple method to calculate Green’s functions for elastic layered media[J]. Bulletin of the Seismological Society of America,1981,71(4):959-971 doi: 10.1785/BSSA0710040959
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出版历程
  • 收稿日期:  2022-04-01
  • 修回日期:  2022-04-07
  • 网络出版日期:  2022-04-15

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