The harmonics of geomagnetic lunar daily variation L caused by M2 tides for declination D, horizontal and vertical intensities H and Z at Sheshan Observatory are calculated by harmonic analysis.

• 摘要用M2潮引起的地磁太阴日变化L的谐波分析方法，计算了佘山地磁台的磁偏角、水平和垂直分量L的谐波系数。