| 摘要: |
| 选取内蒙古地震台网记录的2009~2015年蒙宁交界区103次ML ≥ 2.5地震波形资料，采用震源深度测定的单纯型法、Hyposat法、双差法、PTD法重新测定震源深度，并将所获得结果进行对比分析。用CAP矩张量反演法重新测定了阿拉善左旗5.8级和4.2级地震的震源深度。最终获得用PTD法和双差法所得的震源深度结果与蒙宁交界区的构造特征比较吻合，单纯型法、Hyposat法效果不佳。同时得到蒙宁交界地震构造区的平均震源深度为13.32±8km。 |
| 关键词: 蒙宁 震源深度 对比分析 |
| DOI： |
| 分类号:P315 |
| 基金项目:中国地震局监测、预测、科研三结合课题（160501）资助 |
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| The focal depth analysis of the Meng-Ning border area earthquakes |
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Liu Yongmei1, Liu Fang1, Liu Gaimei2, Zhang Fan1
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1.Earthquake Administration of Inner Mongolia Autonomous Region, Hohhot 010010, China;2.Bayannao'er Earthquake Agency, Bayannaoer 015000, Inner Mongolia, China
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| Abstract: |
| We selected the 103 ML ≥ 2.5 earthquake waveform data on the Meng-Ning border during 2009~2015 recorded by the Inner Mongolia Digital Seismic Networks and used the simplex method Hyposat method,double difference location method,and deterministic method(PTD)for the determination of focal depth,and compared the results. The CAP moment tensor inversion method is used to determine the focal depths of the Alashan Left Flag 5.8 and 4.2 earthquakes. Finally with the deterministic method(PTD)and the double difference location method of the Meng-Ning border area we find that the focal depth results fit better with the tectonic characteristics of the border area while those with the simplex method and the Hyposat method do not. The average depth of he Meng-Ning border seismic tectonic zone is 13.32±8km. |
| Key words: The Meng-Ning border region The focal depth Determination of four methods Comparison and analysis |
