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玉树地震前的电离层异常现象分析

张学民 刘静 赵必强 徐彤 申旭辉 姚璐

张学民, 刘静, 赵必强, 徐彤, 申旭辉, 姚璐. 玉树地震前的电离层异常现象分析[J]. 空间科学学报, 2014, 34(6): 822-829. doi: 10.11728/cjss2014.06.822
引用本文: 张学民, 刘静, 赵必强, 徐彤, 申旭辉, 姚璐. 玉树地震前的电离层异常现象分析[J]. 空间科学学报, 2014, 34(6): 822-829. doi: 10.11728/cjss2014.06.822
ZHANG Xuemin, LIU Jing, ZHAO Biqiang, XU Tong, SHEN Xuhui, YAO Lu. Analysis on Ionospheric Perturbations before Yushu Earthquake[J]. Chinese Journal of Space Science, 2014, 34(6): 822-829. doi: 10.11728/cjss2014.06.822
Citation: ZHANG Xuemin, LIU Jing, ZHAO Biqiang, XU Tong, SHEN Xuhui, YAO Lu. Analysis on Ionospheric Perturbations before Yushu Earthquake[J]. Chinese Journal of Space Science, 2014, 34(6): 822-829. doi: 10.11728/cjss2014.06.822

玉树地震前的电离层异常现象分析

doi: 10.11728/cjss2014.06.822
基金项目: 中国地震局地震预测研究所基本科研业务经费(02132405), 地震行业专项(201004008)和中俄国际科技合作项目(2014DFR21280)共同资助
详细信息
    通讯作者:

    张学民,zhangxm96@126.com

  • 中图分类号: P353

Analysis on Ionospheric Perturbations before Yushu Earthquake

  • 摘要: 分析了玉树地震前地基电离层探测临界频率、GPS TEC和卫星探测原位等离子体参量等多个参数的扰动变化信息, 研究了不同高度异常变化的时空关联性. 分析发现, 在地震前一天的4月13日, 多个电离层参量出现同步扰动异常, 电离层临界频率f0F2异常相对滑动中值增大40%, 异常空间上存在从震中东南向西南漂移的特性; GPS TEC异常增强15TECU (1TECU=1016m-2)左右, 分布于震中南部经度15°范围内, 且有明显的磁共轭效应; DEMETER观测的原位氧离子密度Ni(O+) 4月13日为1-4月中最强的一天, 异常分布偏向赤道区, 但仅局限在30°-50°左右的经度范围内. 综合三个参量的异常特征发现, 无论是空间的局地性还是时间上的密切关联均反映这次电离层扰动可能与玉树地震孕育有关. 结合其他观测信息, 进一步探讨了这次地震孕育过程的地震电离层耦合机理.

     

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出版历程
  • 收稿日期:  2013-11-11
  • 修回日期:  2014-09-05
  • 刊出日期:  2014-11-15

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