摘要
对琼中地磁台台址及邻域10年来磁场监测资料进行分析,查明:a、台址位于海南岛区域磁场背景值变化转折处附近的弱磁性异常区中;b、台址磁场均匀,台址周围5km范围内磁场各要素的差值ΔF<80^(nT)、ΔH<70^(nT)、ΔZ<-200^(nT);c、全岛21个测点的实测平均值减去本台观测值得ΔD=0′.0、ΔF=-120^(nT)、ΔH=-42^(nT)、Δ=-144^(nT);d、距台站100m以外的其他人为铁磁性干扰源对本台的观测值不明显。由此说明本台的地磁观测资料能真实反映当地磁场特征及其变化。本台可作观测海南岛区域磁场变化的窗口。
Analysis of the magnetic field observation data in ten years at the site of Qiongzhong Geomagnetic Station and its neighbourig area suggests that: 1)The site of the geomagnetic station is situated in a weak magnetic anomaly zone near a turning place of the variation in background value of regional magnetic field on Hainan Island; 2)The magnetic field at the station site is uniform and the differences between each magnetic elements within the extent of 5 km around the station site are △F<80nT, H<70nT, and △Z< - 200nT; 3) The mean value observed at 21 stations over the whole Island minus the value observed at the station is D = 0'0, △F=120nT, △H = 42nT,and △Z= - 144nT;4)The interference source of artificial ferromagnetism at 100 m from the station is not clear in the observed value. Thus it suggests that the geomagnetic observation data can really reflect the characteristics and variation of the local geomagnetic field. This station can serve as a 'window' to observe the magnetic variation in the Hainan Island region.
出处
《华南地震》
1992年第4期53-59,共7页
South China Journal of Seismology
关键词
琼中地磁台
地磁
观测
变化
磁场
Qiongzhong Geomagnetic Station
Geomagnetic observation
Geomagnetic variation
Geomagnetic noise
Geomagnetic chart
