地磁实测值与IGRF计算值的差异的变化  

Time Changes in the Differences of Geomagnetic Field between the Observation Values and the IGRF Values

作　　者：陈伯舫 

机构地区：[1]中国香港元朗怡丰花园B座26楼3室,中国香港

出　　处：《华南地震》2007年第1期15-20,共6页South China Journal of Seismology

摘　　要：选择了北京、关岛等6个地磁台,作它们的观测值与IGRF值之差随时间的变化曲线,结果发现,以上6台站地磁测值的异常变化都与附近发生的大震相关,而且震级越大、离台站越近,异常变化越大、越早。而且用IGRF作参考场既可靠又方便。The curves of time changes in the differences of geomagnetic field between the observation values and the IGRF values were drawn by selecting the observation data from six geomagnetic observatories including Beijing and Guam. The result shows that the anomalous change of the geomagnetic observation values from the six observatories above related to the strong earthquakes nearby, the higher the magnitude, the closer to the observatories the epicenter, the greater and earlier the anomalous changes. Moreover, it is reliable and convenient to use the IGRF values as aereference field.

关 键 词：地磁台观测值 IGRF值 震磁关系 

分 类 号：P315.721[天文地球—地震学]