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ISSN?0253-3782 CN?11-2021/P

中强地震能量震级测定

李赞 ,? 刘瑞丰 ,? 孔韩东 ,? 王子博 ,? 袁乃荣

引用本文: 李赞,?刘瑞丰,?孔韩东,?王子博,?袁乃荣. 2019.?中强地震能量震级测定.?地震学报,?41(3):?289-301. doi: 10.11939/jass.20180139 shu
Citation:? Li Zan,?Liu Ruifeng,?Kong Handong,?Wang Zibo,?Yuan Nairong. 2019.?Energy magnitude determination of moderate-strong earthquakes.?Acta Seismologica Sinica,?41(3):?289-301. doi: 10.11939/jass.20180139 shu

中强地震能量震级测定

    通讯作者: 刘瑞丰, liurf@cea-igp.ac.cn
摘要: 本文根据地震波衰减特性,开展了利用宽频带地震波形数据测定地震波能量ES和能量震级Me的方法研究。利用震中距处于20°—98°范围内的宽频带远震P波波形数据,测定了4次国外和4次国内中强震的能量震级Me,并对其面波震级MS、矩震级MW及能量震级Me进行了分析对比。结果表明:面波震级MS表示的是地震在某一固定频率所辐射的地震波能量大小;矩震级MW与地震所产生的断层长度、断层宽度、震源破裂的平均位错量等静态构造效应密切相关;而能量震级Me反映的是震源动态特征,与地震震源的动力学特性密切相关。由于地震是以地震波形式辐射,能量主要集中在震源谱的拐角频率附近,因此能量震级Me更适合描述地震的破坏性。由此可见,联合测定面波震级MS,矩震级MW和能量震级Me对于地震定量研究以及地震灾害与风险评估具有重要作用。

English

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  • 图?1? 计算九寨沟地震能量震级所用台站分布图

    Figure?1.? Distribution of the stations used for calculation of energy magnitude of Jiuzhaigou earthquake

    图?2? 九寨沟地震能量震级Me残差分布

    Figure?2.? Distribution of the residuals for energy magnitude Me of the Jiuzhaigou earthquake

    图?3? 计算芦山地震能量震级所用台站分布图

    Figure?3.? Distribution of the stations used for calculation of energy magnitude of Lushan earthquake

    图?4? 芦山地震能量震级Me残差分布

    Figure?4.? Distribution of the residuals for energy magnitude Me of the Lushan earthquake

    图?5? 计算哥斯达黎加地震(a)和尼加拉瓜地震(b)能量震级所用台站分布图

    Figure?5.? Distribution of the stations used for calculation of energy magnitude of Costa Rica earthquake (a) and Nicaragua earthquake (b)

    图?6? 牡丹江地震台记录到的哥斯达黎加地震(a)和尼加拉瓜地震(b)的波形记录图

    Figure?6.? Comparison of P-waveforms from Costa Rica earthquake (a) and Nicaragua earthquake (b) recorded by the station MDJ

    台站名震中距/°Me台站名震中距/°Me台站名震中距/°Me
       IU.MAKZ21.467.02   IU.MBWA56.426.22   IU.PAB81.556.18
       BK.CMB97.756.66   IU.WAKE57.196.47   IU.FUNA82.636.21
       II.AAK24.866.70   IU.KBS57.876.24   IU.KIP84.856.31
       II.KURK25.446.45   IU.ADK58.326.46   II.TAU85.866.34
       IU.MAJO28.236.36   IU.PMG59.256.16   IU.LSZ86.816.12
       II.SIMI28.576.50   II.MSEY59.386.17   II.MSVF87.126.66
       II.BRVK31.066.19   II.WRAB60.586.06   IU.POHA87.716.53
       II.ERM32.056.08   II.KWAJ63.296.58   II.FFC89.316.47
       IU.YSS32.376.12   IU.KONO63.836.15   IU.COR91.206.34
       IU.DAV32.986.76   II.ALE64.106.08   IU.AFI92.976.75
       IU.YAK33.206.30   IU.FURI64.426.24   GT.LBTB94.436.58
       II.ARU38.596.09   IU.MIDW66.276.45   II.CMLA94.856.48
       IU.MA240.406.09   IU.CTAO66.906.05   IU.XMAS96.146.28
       II.KAPI41.076.31   IU.NWAO67.316.56   IU.KOWA96.416.95
       IU.GUMO42.066.53   IU.COLA67.416.12   IU.RAO96.806.22
       II.UOSS42.106.25   IU.HNR68.246.57   IU.TSUM97.397.07
       IU.PET43.325.89   II.KDAK68.996.36   碾子山20.306.63
       IU.GNI47.056.22   II.BFO69.185.94   五常21.506.55
       II.KIV47.896.29   IU.KMBO71.255.92   讷河21.776.01
       IU.BILL49.336.47   IU.TARA71.836.85   宾县21.976.35
       II.DGAR50.386.52   II.ESK71.916.02   宝清21.986.47
       II.OBN50.666.18   II.BORG73.186.28   靖宇21.066.14
       II.RAYN51.606.23   II.ABPO75.126.18   柳河20.956.21
       II.LVZ51.766.03   II.MBAR76.276.63   丰满21.556.42
       IU.KEV54.585.97   IU.SFJD77.956.41   抚松20.656.31
       IU.ANTO55.996.19   IU.JOHN78.176.01   牡丹江22.916.55
        平均能量震级6.3
      注:表中10个中国台站的地震引自国家测震台网数据备份中心(2007)郑秀芬等(2009)

    表?1? 计算九寨沟地震能量震级Me的单台数据

    Table?1.? Single station data for calculating energy magnitude Me of Jiuzhaigou earthquake

    下载: 导出CSV
    发震时间发震地点震源深度
    /km
    震源破裂
    时间/s
    震源机制
    类型
    MS
    (CENC)
    MW
    (GCMT)
    Me
    (IRIS)
    Me
    (本文)
    1991-04-22哥斯达黎加10.081T8.17.67.47.4
    1992-09-02尼加拉瓜15.0172T7.77.66.76.6
    2006-11-15昆士兰39.0133T8.08.37.77.7
    2007-01-13昆士兰10.0101N7.98.18.68.1
    2008-05-12四川汶川12.8126TS8.07.98.18.0
    2013-04-20四川芦山12.239T7.06.66.76.6
    2014-08-03云南鲁甸10.046S6.56.26.46.4
    2017-08-08四川九寨沟9.043S7.06.56.46.3
      注:T为逆断层,N为正断层,S为走滑断层,TS为包含走滑成分的逆断层。

    表?2? 不同机构测定的4次国外和4次国内地震的各类震级

    Table?2.? Various magnitudes measured by different institutes for four overseas and four domestic earthquakes

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  • 通讯作者:? 刘瑞丰, liurf@cea-igp.ac.cn
  • 收稿日期:? 2018-12-18
  • 录用日期:? 2019-02-15
  • 网络出版日期:? 2019-05-01
通讯作者: 陈斌, bchen63@163.com
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