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搜集了昌黎和白家疃1972～1984年的磁变仪资料.19组资料的计算结果表明:①白家疃的单台垂直场转换函数A,B及昌黎的B没有明显异常,但昌黎的Au,Av有明显异常变化.这一结果与用量图方法求得的a,b基本一致.表明异常局限在余震区及其附近;③台际转换函数Cu,Cv,Fu,Fv在唐山地震前都有一些变化,但虚部Cv,Fv的变化较为显著.这点与对台湾花莲地震的研究结果一致.但Beamish（1982）对Carlisle 5级地震的研究结果,是实部Fu,Cu的变化较为显著.
Magneto-rheological data of Changli and Baijiatuan were collected from 1972 to 1984. The calculation results of the 19 groups of data show that: ①A single vertical field transfer function A, B and Changli B of Baijiatuan have no obvious abnormalities, but Changli’s Au, and Av. This result is basically consistent with a and b calculated by the method of volume diagram, indicating that the anomaly is localized in and around the aftershock zone. (3) The interplanetal transfer functions Cu, Cv, Fu and Fv But there are some changes, but the changes of imaginary part Cv and Fv are more obvious, which is consistent with the research results of Hualien earthquake in Taiwan.But Beamish’s (1982) study on the Carlisle M5 earthquake is the result of changes in real Fu and Cu More obvious.