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一九七六年四月六日零时五十五分在内蒙和林格尔县新丰公社和新店子公社(北纬40°14′,东经112°12′)发生6.3级地震。震前我省的大同、临汾地磁台的ΔZ有明显的异常反映,但由于台站少、水平低,事先没有进行预报。震后收集了河北省地震局、内蒙古地震队、武汉地震大队等单位的部分台站资料(见图1),分别用“红绿灯”法、日变形态、日均值、幅度差、平均幅度差等方法进行了计算,作图分析。发现“红绿灯”法和日变形态(低点位移)两种方法效果效好,异常比较明显。
An earthquake measuring 6.3 on the Richter scale hit Xinfeng commune and Xindianzi commune (40 ° 14’N, 112 ° 12’E) on the 6 April, at 0:55 on April 6, 1976. Before the earthquake in our province Datong, Linfen geomagnetic Taiwan ΔZ obvious abnormalities, but because of fewer stations, low level, without prior forecast. After the earthquake, we collected some stations’ information (see Figure 1) from Seismological Bureau of Hebei Province, Inner Mongolia Seismological Corps and Wuhan Seismic Brigade (see Figure 1), respectively using the “traffic light” method, daily variation, daily mean value, amplitude difference and average amplitude difference The method was calculated and plotted. It is found that the two methods of “traffic light” method and daily deformation (low displacement) are effective and obvious.