新疆质子磁力仪观测资料分析

Preliminary analysis of proton magnetometer data in Xinjiang region

利用新疆区域FHD-2B质子磁力仪资料,分析各地磁台子夜均值、磁静日、傅里叶谱。结果发现:新疆区域2009—2015年磁场强度年变化率均值较1991—2007年大,主要是因为24 h、12 h谐波振幅的增大;受纬度控制,各地磁台日变化峰谷值幅度上存在差异,乌什台峰谷值的差值比温泉台、克拉玛依台大,这种差异冬季小夏季大;地磁日变化谐波中,24 h、12 h谐波形态相似,一峰一谷,8 h、6 h谐波形态两峰两谷;11、12、1、2月4种谐波振幅相近,其他月份差异增大。

Using FHD-2B proton magnetometer data of Xinjiang region, the midnight mean, magnetically quiet day, Fourier spectral analysis of every station are studied. The results of analysis show that the mean value of annual variation ratios of regional magnetic field intensity in Xinjiang from the year 2009 to 2015 is larger than that in 1991—2007. The main reason comes from amplitude increases of the 24 h,12 h harmonic wave. Controlled by latitude, the diurnal peak valley values exist amplitude difference around the magnetic stations. The difference of peak and valley values at Wushi Geomagnetic station is larger than those at Wenquan and Karamay Stations. This type of difference is little in winter and large in summer. Among the geomagnetic diurnal variation harmonics, the waveform of 24 h, 12 h of harmonic are similar, of a peak and a valley. While the waveform of 8 h, 6 h of harmonics are of two peaks and two valleys. The amplitudes of four type harmonics, November, December, January and February, are close. The differences of other months increase.