| 2020年3月20日蒙古MS 5.9地震前地倾斜资料异常特征分析 |
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| 引用本文： | 张录,张剑锋,周康云,候赛因·赛买提,木巴拉克·江布尔拜.2020年3月20日蒙古MS 5.9地震前地倾斜资料异常特征分析[J].地震地磁观测与研究,2022,43(3):109-117. |
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| 作者姓名： | 张录 张剑锋 周康云 候赛因·赛买提 木巴拉克·江布尔拜 |
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| 作者单位： | 中国新疆维吾尔自治区 839000 哈密地震监测中心站 |
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| 基金项目： | 新疆地震科学基金(项目编号:202127) |
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| 摘 要： | 采用形态法和小波分析法，分析2020年3月20日蒙古MS 5.9地震震中距400 km范围内巴里坤、富蕴和芨芨台地震台倾斜观测资料的震前异常特征。结果表明：3套资料在震前均具有明显的中短期异常，分别表现为反向趋势变化、破年变形态和倾斜速率减缓的特征；使用db4小波对3套资料进行分析，其6—9阶在震前出现周期为几天至几十天的低频短期异常，同时巴里坤水平摆倾斜仪EW分量8—9阶趋势异常较显著。
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| 关 键 词： | 蒙古MS 5.9地震 地倾斜 异常特征 小波分析 |
Analysis on anomaly characteristics of ground tilt data before Mongolia MS 5.9 earthquake on march 20,2020 |
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| ZHANG Lu,ZHANG Jianfeng,ZHOU Kangyun,Housaiyin·SAIMAITI,Mubalake·JIANGBUERBAI.Analysis on anomaly characteristics of ground tilt data before Mongolia MS 5.9 earthquake on march 20,2020[J].Seismological and Geomagnetic Observation and Research,2022,43(3):109-117. |
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| Authors: | ZHANG Lu ZHANG Jianfeng ZHOU Kangyun Housaiyin·SAIMAITI Mubalake·JIANGBUERBAI |
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| Institution: | Hami Earthquake Monitoring Center Station, Xinjiang Uygur Autonomous Region 839000, China |
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| Abstract: | In this paper,the methods of morphological and wavelet analysis are used to analyze the anomaly characteristics of tilt data at Barkol,Fuyun and Jijitai stations within 400 km of Mongolia MS 5.9 earthquake on March 20,2020.The results show that there are obvious medium-short term anomalies in the three sets of data before the earthquake,which are characterized by inverse trend,abnormal annual variation and slowing down of tilt rate respectively;Using db4 wavelet to analyze the three sets of data,it is found that there are short term low-frequency anomalies of order 6-9 with periods from several days to dozens of days before the earthquake,and the trend anomalies of order 8-9 of EW component of Barkol horizontal pendulum tiltmeter are also significant. |
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| Keywords: | Mongolia MS 5 9 earthquake ground tilt anomaly characteristics wavelet analysis |
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