1994年台湾海峡7.3级地震与仑坪台、泉州台地磁变化的关系

地磁月均值的长期变化结果表明，1994年台湾海峡7．3级地震前4年，泉州台与仑坪台的X和Z分量均出现异常，X分量呈现负异常，Z分量呈现正异常，异常幅度达20－30nT.另外，地震前一年半，泉州台与通海台的视深比或仑坪台与通海台的视深比（周期为24h)都出现过先降后升的异常变化。

Study on geomagnetic variations for Lunping and Quanzhou observatories before and after the MS 7.3 Taiwan Str ait earthquake in 1994

The secular variations of the monthly-mean-differ ence between different observatories indicate that significant anomalous changes in the X and Z components for Lunping and Q uanzhou observatories appear to b e related to the MS 7.3 Taiwan Strait earthquake. The anomalo us changes started before 4 years of the occurrence. The anomalous change of the X component appears to be negative， and the anomalous change of the Z component appears to be positive. Those magnitudes of anomalous changes are about 20～30 n T.Besides, the apparent-depth-ratio (for the period of 24 h) between Quanzho u and Tonghai observatories,or Lunping and Tonghai observatories, drops firs t and then goes up within the duration of 1.5 years before the earthquake occur rence.