2021年2月13日日本本州东海岸MW7.2地震矩心矩张量解

张喆 许力生

张喆,许力生. 2021. 2021年2月13日日本本州东海岸MW7.2地震矩心矩张量解. 地震学报,43(2):255−259 doi: 10.11939/jass.20210025
引用本文: 张喆,许力生. 2021. 2021年2月13日日本本州东海岸MW7.2地震矩心矩张量解. 地震学报,43(2):255−259 doi: 10.11939/jass.20210025
Zhang Z,Xu L S. 2021. The centroid moment tensor solution of the 13 February 2021 MW7.2 earthquake in the east coast of Honshu,Japan. Acta Seismologica Sinica,43(2):255−259 doi: 10.11939/jass.20210025
Citation: Zhang Z,Xu L S. 2021. The centroid moment tensor solution of the 13 February 2021 MW7.2 earthquake in the east coast of Honshu,Japan. Acta Seismologica Sinica43(2):255−259 doi: 10.11939/jass.20210025

2021年2月13日日本本州东海岸MW7.2地震矩心矩张量解

doi: 10.11939/jass.20210025
基金项目: 中国地震局地球物理研究所基本业务费(DQJB20K40)资助
详细信息
    通讯作者:

    许力生,e-mail:xuls@cea-igp.ac.cn

  • 中图分类号: P315.3+1

The centroid moment tensor solution of the 13 February 2021 MW7.2 earthquake in the east coast of Honshu,Japan

  • 图  1  日本本州东海岸MW7.2地震矩心矩张量解反演过程

    (a) 矩心时间τc搜索;(b) 矩心水平空间搜索,黄色圆圈表示矩心水平坐标;(c) 矩心深度hc搜索;(d) 矩心相对震中的位置,红色沙滩球表示矩心矩张量解,红色星形表示震中

    Figure  1.  Inversion process of the centroid moment tensor solution for the MW7.2 earthquake in the east coast of Honshu,Japan

    (a) Search for centroid time τc;(b) Search for the horizontal location of the centroid (yellow circle);(c) Search for centroid depth hc; (d) The centroid location (beach-ball) with respect to the instrumental epicenter (red hexagon)

    图  2  矩心矩张量反演参数以及台站分布与反演结果

    Figure  2.  The parameters of the centroid moment tensor inversion,the station distribution and the inversion results

    图  3  观测数据与合成数据的比较

    Figure  3.  Comparison between the observed (blue) and synthetic (red) waveforms

    图  4  2011年MW9.1地震(灰色沙滩球)后M>2.5事件以及本州东海岸MW7.2地震的余震分布和各机构发布的该主震的矩心矩张量反演结果

    Figure  4.  The centroid moment tensor solutions (colored beach-balls) from various institutions and aftershocks of the MW7.2 earthquake in east coast of Honshu as well as the M>2.5 earthquakes since the 2011 MW9.1 earthquake (gray beach-ball)

    表  1  GCMT,USGS 和本研究所得日本本州东海岸MW7.2地震矩心矩张量解

    Table  1.   The centroid moment tensor solutions for the MW7.2 earthquake in the east coast of Honshu,Janpan,from GCMT,USGS and this study

    机构矩张量/(1019 N·m)矩心参数
    MrrMttMppMrtMrpMtpτc/s北纬/°东经/°矩心深度/km
    GCMT (2021)5.540−0.647−4.8900.269−1.760−1.7409.637.60141.6350.7
    USGS (2021)(W震相)4.557−0.220−4.3370.724−0.773−1.55013.237.63141.8860.5
    USGS (2021)(体波)5.964−1.531−4.4340.313−2.151−1.15637.75141.7250.6
    本文8.588−0.147−8.440−0.217−2.755−1.00012.037.65141.4550.0
    下载: 导出CSV

    表  2  GCMT,USGS以及本研究得到的日本本州东海岸MW7.2地震的最佳双力偶解

    Table  2.   The best double-couple solutions for the MW7.2 earthquake in the east coast of Honshu,Japan,from USGS,GCMT and this study

    机构标量地震矩
    /(1019 N·m)
    双力偶
    成分占比
    节面Ⅰ节面Ⅱ
    走向/°倾角/°滑动角/°走向/°倾角/°滑动角/°
    GCMT (2021)5.80099%19253802838103
    USGS (2021)(W震相)4.83196%18749743043107
    USGS (2021)(体波)5.90361%19155822535102
    本文9.008100%186548973691
    下载: 导出CSV
  • 张喆,梁皓,许力生. 2020. 2020年6月23日墨西哥MW7.4地震矩心矩张量解[J]. 地震学报,42(4):504–508.
    Zhang Z,Liang H,Xu L S. 2020. The centroid moment tensor solution of the 23 June 2020 MW7.4 Mexico earthquake[J]. Acta Seismologica Sinica,42(4):504–508 (in Chinese).
    Duputel Z,Rivera L,Fukahata Y,Kanamori H. 2012a. Uncertainty estimations for seismic source inversions[J]. Geophys J Int,190(2):1243–1256. doi: 10.1111/j.1365-246X.2012.05554.x
    Duputel Z,Rivera L,Kanamori H,Hayes G. 2012b. W phase source inversion for moderate to large earthquakes (1990—2010)[J]. Geophys J Int,189(2):1125–1147. doi: 10.1111/j.1365-246X.2012.05419.x
    GCMT. 2021. Global CMT catalog[EB/OL]. [2021-02-13]. https://www.globalcmt.org/CMTsearch.html.
    Kanamori H,Rivera L. 2008. Source inversion of W phase:Speeding up seismic tsunami warning[J]. Geophys J Int,175(1):222–238. doi: 10.1111/j.1365-246X.2008.03887.x
    USGS. 2021. M7.1: 72 km ENE of Namie, Japan [EB/OL]. [2021-02-13]. https://earthquake.usgs.gov/earthquakes/eventpage/us6000dher/moment-tensor? source=us&code=us_6000dher_mww.
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出版历程
  • 收稿日期:  2021-02-16
  • 修回日期:  2021-02-18
  • 网络出版日期:  2021-02-20
  • 刊出日期:  2021-07-07

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