2014年云南鲁甸MS6.5地震峰值加速度震动图

陈鲲, 俞言祥, 高孟潭, 亢川川

陈鲲, 俞言祥, 高孟潭, 亢川川. 2015: 2014年云南鲁甸MS6.5地震峰值加速度震动图. 地震学报, 37(3): 429-436. DOI: 10.11939/jass.2015.03.006
引用本文: 陈鲲, 俞言祥, 高孟潭, 亢川川. 2015: 2014年云南鲁甸MS6.5地震峰值加速度震动图. 地震学报, 37(3): 429-436. DOI: 10.11939/jass.2015.03.006
Chen Kun, Yu Yanxiang, Gao Mengtan, Kang Chuanchuan. 2015: ShakeMap of peak ground acceleration for 2014 Ludian, Yunnan, MS6.5 earthquake. Acta Seismologica Sinica, 37(3): 429-436. DOI: 10.11939/jass.2015.03.006
Citation: Chen Kun, Yu Yanxiang, Gao Mengtan, Kang Chuanchuan. 2015: ShakeMap of peak ground acceleration for 2014 Ludian, Yunnan, MS6.5 earthquake. Acta Seismologica Sinica, 37(3): 429-436. DOI: 10.11939/jass.2015.03.006

2014年云南鲁甸MS6.5地震峰值加速度震动图

基金项目: 中国地震局地球物理研究所基本科研业务专项(DQJB13B19)、地震行业科研专项(201308018)及“十二五”国家科技支撑计划项目(2012BAK15B01-04)共同资助.
详细信息
    通讯作者:

    陈鲲, E-mail: chenkun-6620@163.com

  • 中图分类号: P315.9

ShakeMap of peak ground acceleration for 2014 Ludian, Yunnan, MS6.5 earthquake

  • 摘要: 综合考虑震中地区地质构造背景、震源机制解结果、余震分布以及我国西部地区地震动参数衰减特征,运用考虑场地效应的震动图快速生成方法,将收集到的62组强震台站的峰值加速度作为插值使用,估计了2014年8月3日云南鲁甸MS6.5地震峰值加速度震动图. 利用地震后获得的强震记录计算了强震台站观测值与借助经验性衰减关系得到的估计值之间的系统偏差,校正了缺少台站地区借助经验性衰减关系得到的估计值,获得了校正后的峰值加速度分布图. 结果显示,鲁甸MS6.5地震的地震动峰值加速度随距离的衰减速度比前人对我国西部衰减统计的结果更快,对数偏差校正的结果更符合本次地震的衰减规律. 校正后的峰值加速度大于40 cm/s2的区域面积近8000 km2,比未经校正的峰值加速度大于40 cm/s2的面积减小了40%左右.
    Abstract: Considering the geological structure background, focal mechanism solutions, aftershock distribution and attenuation characteristics of the ground motion in western China, ShakeMap of peak ground acceleration (PGA) for the Ludian, Yunnan, MS6.5 earthquake on 3 August 2014 was acquired, in which the method of rapid generation ShakeMaps considering site effects was used, and the PGAs of 62 strong motion stations for this earthquake were used as interpolation. Then, distribution of PGA was amended by using PGA observations to correct system bias of theoretical estimates in the area without PGA observations. The results show that the attenuation of ground motion with distance for the Ludian MS6.5 earthquake was faster than that from previous studies on western China. The result by correction for bias in logarithmic regression was more consistent with attenuation law for this earthquake. The area with corrected PGA greater than 40 cm/s2 was nearly 8000 km2, which was reduced by about 40% compared with that of uncorrected.
  • 图  1   鲁甸MS6.5地震峰值加速度震动图 (a) 未经校正的峰值加速度;(b) 经台站观测值校正的峰值加速度

    Figure  1.   ShakeMaps of peak ground acceleration for the Ludian MS6.5 earthquake (a) Peak ground acceleration without correction; (b) Peak ground acceleration corrected with observations

    图  2   鲁甸MS6.5地震强震台站基岩观测值与估计值的对数拟合关系

    Figure  2.   Logarithmic fitting between observed values and estimated values on bedrock beneath strong motion stations for the Ludian MS6.5 earthquake

    图  3   鲁甸MS6.5地震强震台站峰值加速度校正结果

    Figure  3.   Peak ground acceleration results of strong motion stations by bias correction for the Ludian MS6.5 earthquake

    表  1   鲁甸MS6.5地震62个强震台站的峰值加速度

    Table  1   Peak ground acceleration of 62 strong motion stations for the Ludian MS6. 5 earthquake

    序号台站名称东经/°北纬/°最大加速度/(cm·s-2)
    东西向南北向
    1鲁甸龙头山103.427.1949.1705.9
    2昭通103.727.39.414.9
    3靖安103.827.510.112.0
    4茂林103.627.624.618.0
    5大关寿山乡103.927.94.75.1
    6绥江103.928.63.23.2
    7水竹103.727.98.46.9
    8甸沙乡103.125.42.22.7
    9巧家102.926.924.820.6
    10马树103.226.8135.2133.4
    11茨院103.627.245.944.8
    12程海乡100.726.52.74.9
    13大关103.927.74.23.4
    14吉利镇104.028.08.97.4
    15铅厂103.226.9146.0140.3
    16会东铅锌102.826.722.021.9
    17普格地办102.527.418.212.4
    18普格白水102.627.314.914.6
    19会东新街102.726.812.112.5
    20普格荞窝102.527.56.56.8
    21会理凤营102.126.56.46.6
    22会理云甸102.327.17.27.3
    23宁南松新102.627.26.17.9
    24攀枝同德101.526.74.75.4
    25米易撒莲102.026.87.35.9
    26德昌农科102.227.45.44.9
    27米易攀莲102.126.96.43.6
    28盐边红格101.926.56.55.6
    29马边地办103.528.84.93.3
    30泸定加郡102.229.71.61.0
    31冕宁惠安102.228.62.61.5
    32冕宁拖乌102.328.82.82.3
    33盐源卫城101.627.43.02.8
    34布拖地办102.827.72.42.1
    35昭觉气象102.828.04.83.0
    36石棉先锋102.329.32.51.9
    37沐川利店103.729.04.73.2
    38峨眉交大103.429.63.32.8
    39宜宾永兴104.629.01.92.4
    40珙县中学104.728.42.14.7
    41泸州专业105.428.91.62.0
    42寻甸103.225.35.34.7
    43拖布卡103.026.416.516.5
    44法者乡103.026.06.05.9
    45阿旺乡103.325.94.34.2
    46会泽103.326.416.117.8
    47汤丹镇103.126.26.55.3
    48昆明市粮食局第二直属粮库102.725.02.01.7
    49仁和镇101.026.52.31.6
    50金官镇100.726.83.83.0
    51九河乡100.026.82.01.2
    52片角乡100.626.02.12.0
    53布拖拖觉102.827.511.617.0
    54会理地办102.226.78.2-7.0
    55昭通强震观测台阵1103.126.615.510.6
    56昭通强震观测台阵2103.126.211.514.5
    57昭通强震观测台阵3102.727.012.212.9
    58昭通强震观测台阵4103.126.419.525.2
    59昭通强震观测台阵5103.226.521.117.9
    60昭通强震观测台阵6103.027.112.320.6
    61昭通强震观测台阵7102.626.16.26.3
    62昭通强震观测台阵8103.026.819.023.7
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出版历程
  • 收稿日期:  2014-08-31
  • 修回日期:  2015-04-08
  • 发布日期:  2015-04-30

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