A Method for Extracting Seismic Tec Anomaly Information Based on Non-Seismic Dynamic Background Field

Abstract

The invention provides an aseismic dynamic background field based extraction method of seismic TEC abnormal information. The method comprises the following steps of establishing a dynamic background field, carrying out wavelet multi-scale analysis, utilizing a support vector machine regression model and carrying out a method for extracting abnormal information. According to the extraction method,through an aseismic dynamic background field, the own periodical change of a TEC is considered; meanwhile, the interference of space environments of a solar activity and a geomagnetic activity and thelike are also considered; an extractable seismic TEC abnormality is more accurate; meanwhile, the interference and error brought by other aseismic factor in the process of extracting seismic ionospheric TEC abnormal information can be reduced; the detection accurate rate of the seismic TEC abnormality is improved; the method has a higher early warning rate during a seismic period and a lower false warning rate during an aseismic period; and the extraction efficiency of the seismic TEC abnormal information can be improved.

Description

technical field [0001] The invention relates to the field of seismic TEC information extraction, in particular to a method for extracting seismic TEC abnormal information based on non-seismic dynamic background field. Background technique [0002] The ionosphere is an important part of the space environment of the sun and the earth, and its drastic changes will have a huge impact on human production and life. [0003] The existing seismic ionospheric TEC anomaly extraction mainly uses the following two methods: one is the sliding time window method; the other is the sliding quartile method, but there are many defects in the above two methods, for example: due to the The influence of periodic fluctuations of TEC itself is not considered, resulting in periodic information in the extracted anomalies; as the background field does not consider the influence of the disturbance of the earth's space environment caused by non-seismic factors such as solar activities, it makes it poss...

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Problems solved by technology

[0003] The existing seismic ionospheric TEC anomaly extraction mainly uses the following two methods: one is the sliding time window method; the other is the sliding quartile method, but there are many defects in the above two methods, for example: due to the The influence of periodic fluctuations of TEC itself is not considered, resulting in periodic information in the extracted anomalies; as the background field does not consider the influence of the disturbance of the earth's space environment caused by non-seismic factors such as solar activities, it makes it possible to A large number of TEC anomalies can be extracted, and there is a high false alarm rate; at the same time, when earthquake events and other non-seismic disturbance events occur at the same time, the source of TEC anomalies cannot be identified

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