为了研究1987年9月23日日环食的地磁场效应,作者在南通地震台进行了地磁观测。观测结果表明,在消除了地磁场当天正常日变化及地磁场的干扰变化后,日环食期间地磁场表现出一定的扰动效应。证实了日环食期间地磁场确实发生了变化。 In order to study the geomagnetic field effect of the solar eclipse on September 23, 1987, the authors conducted geomagnetic observations at the Nantong Seismic Station. The observation results show that after eliminating the normal diurnal variation of geomagnetic field and the variation of geomagnetic disturbance, the geomagnetic field shows some disturbing effects during the solar eclipse. Confirmed that the earth’s magnetic field did change during the solar eclipse.