摘要
把用来分析地震波波形的时间线性度和空间线性度两种方法，应用到地磁资料分析当中，具体分析处理了１９７６年７月２８日唐山Ｍｓ７．８地震和１９８９年１０月１９日大同Ｍｓ６．１地震前后地磁场资料，并对这两次地震前后地磁时空线性度变化情况进行了研究。所得结果表明：①较大地震前地磁场的时空线性度均可能呈现出较明显的下降异常变化，有些在震前回升，②各分量的时空线性度呈现异常的时间基本上同步，并与波速异常发展趋势基本相符。
In this paper, by using the methods of temporal linearity and spatial linearity, thegeomagnetic data before and after July 28, 1976 Tangshan earthquake (Ms=7. 8)and October 19, 1989 Datong earthquake (MS=6.1) were analysed and processed. Then, the anomalous variations in the temporal and spatial linearity before andafter both earthquakes were studied. The results obtained are as follows: Before bothlarge earthquakes the more remarkable decrease-type anomalous variations in the temporal and spatial linearity of geomagnetic field have been presented. The precursory anomalous times of temporal and spatial linearity are nearly synchronous and consistent withthe seismic--wave velocity anomalies.
出处
《地震地磁观测与研究》
1994年第5期22-27,共6页
Seismological and Geomagnetic Observation and Research
关键词
空间线性度
地磁场
地震预报
temporal linearity, spatial linearity, geomagnetic field, shocked-magnetic effect, earthquake prediction
