| 数字化地磁数据的空间相关分析 |
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| 引用本文： | 张秀霞,孙春仙,陈健,宋德伟.数字化地磁数据的空间相关分析[J].地震地磁观测与研究,2008,29(6):134-138. |
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| 作者姓名： | 张秀霞 孙春仙 陈健 宋德伟 |
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| 作者单位： | 1. 中国南京,210014,江苏省地震局
2. 中国江苏,223001,淮安地震台 |
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| 摘 要： | 以FHD磁力仪观测数据作空间相关分析，采用不同整点值的相关、不同时间段的均值相关、分钟值数据的直接相关和不同台站观测数据存在的相位差等方面的分析处理，发现每日整点值的相关系数最高的时间段为09时至15时之间，其他时间段相关系数都相对较低，但就地震预报而言，最合适的时间段为23时～05时，而不是采用21时的数据；用分钟值作相关处理，可以更加突出异常的连续性和演化性特征，异常时间段能够更加清晰；另外，利用分钟值能对不同台站间的观测结果进行较好的相位校正。结果表明：随着地磁观测数字化的普及，数据信息量的大幅增加，我们应该采用更加灵活与合理的方法处理数据资料。
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| 关 键 词： | 地磁 数字化 相关 |
The space correlation analysis of digital geomagnetic data |
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| Zhang Xiuxia,Sun Chunxian,Chen Jian,Song Dewei.The space correlation analysis of digital geomagnetic data[J].Seismological and Geomagnetic Observation and Research,2008,29(6):134-138. |
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| Authors: | Zhang Xiuxia Sun Chunxian Chen Jian Song Dewei |
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| Institution: | Zhang Xiuxia , Sun Chunxian ,Chen Jian, Song Dewei( 1.Earthquake Administration of Jiangsu Province ,Nanjing 210014, China ;2. Huaian Seismic Station, Jiangsu Province 223001, China) |
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| Abstract: | In this paper, the space correlation analysis of the FHD magnetometer observation data is presented. Multiple processes, including the correlation of different value at whole point, correlation of the average value of different time segments, direct correlation of minute sample data and the phase difference analysis of data from different stations are performed. It is found that the highest correlation coefficient of whole point value correlation is in the period of 09 am to 03 pm, while the coefficients are lower in other time. For earthquake prediction, however, the most appropriate time period is 11 pm to 05 am, rather than the data at 09 pm. The correlation process of minute data can enhance the continuity and the evolution feature of the anomalies. The time periods of anomalies become clear. In addition, phase correcting of different stations can be derived by use of minute data. The results indicate that with the popularization of digital geomagnetic observation and the great increment of data volume, more flexible and more rational methods should be applied in data process. |
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| Keywords: | geomagnetic digital correlation |
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