中文摘要：

应用四川芦山MS7.0和甘肃岷县漳县MS6.6地震震中周围部分电磁扰动观测台站资料,主要利用电磁扰动原始波形比较以及电磁脉冲能量分析两种方法,对两次地震前电磁扰动观测资料进行分析研究。结果表明：1两次地震前4个电磁扰动台站原始曲线出现异常变化,主要表现形式为观测值脉冲信号频繁突跳、增大以及震前波形畸变、反复出现阶跃;2两次地震前,电磁扰动台站都记录到了明显的脉冲能量增大的异常现象,主要异常出现的时间在几天~2个多月;3电场分量和磁场分量都在地震前记录到了异常变化,但反映出的异常时间及变化幅度不同步。对于研究所得结果,从地震电磁辐射的产生机制方面进行了尝试性的理论解释。

英文摘要：

Based on data of electromagnetic disturbance observation stations surrounding the epicenters of the Lushan Ms7. 0 and Minxian--Zhangxian Ms6. 6 earthquakes, we mainly use the original waveform comparison of electromagnetic disturbances and statisti- cal of the electric magnetic field pulse energy, and analyze the data of electromagnetic dis- turbance stations before the two earthquakes. The results show that： ① The abnormal changes in the original waveform before the two earthquakes showed mainly in the forms of frequent sudden jump and increases of pulse signal for the observed values, and wave- form distortion and repeated steps before earthquakes. ② The increased energy of the geo- magnetic field pulse are recorded at the geo-electromagnetic disturbance stations before two earthquakes, which basically appeared in a few days to 2 months before the earth- quake. ③ Abnormal changes in the electric component and magnetic field components are recorded before earthquake, but the magnitude of change and the abnormal time are not synchronized. From the results obtained, a tentative theoretical explanation has been pres anted in terms of the generation mechanism of seismic electromagnetic radiation from the two earthquakes.