| Characteristics of Geoelectric and Geomagnetic Data before Strong Earthquakes in the North China Region |
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| 作者姓名： | TianShan GuanHuaping WuGuoyou LiuYunxiu |
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| 作者单位： | [1]EarthquakeAdministrationofTianjinMunicipality,Tianjin300201,China [2]CenterforAnalysisandPrediction,ChinaEarthquakeAdministration,Beijing100036,China |
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| 摘 要： | The earth resistivity and geomagnetic observation data of the Z component from many stations in near-epicentral areas of strong earthquakes are combined and calculated by using a spatial linearity method and a new characteristic value, the spatial linearity a, describing the precursory field in near-epicentral area of strong earthquake, is obtained. The analysis and calculation results of geoelectric and geomagnetic observation data prior to 8 earthquakes with M≥5.5 occurring in the North China region show that a value near the epicentral area tendsto decrease significantly half a year before strong earthquakes.
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| 关 键 词： | 强烈地震 地层电阻系数 地磁场 空间线性 短时不规则性 |
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