OBSERVATIONAL STUDY ABOUT THE INFLUENCE OF THE SOLAR-WIND ON THE EARTHS ROTATION

The data on the variation of the Earth's rotation from IERS and the pa rameters of the solar wind measured by IPM 8 from July 1992 to Septemb er 1995 were used for a regression analysis. The results show that the re seems to be a weak linear correlation between the velocity of the s olar wind near the Earth, V, and the variation of the length of the da y, Delta lod(1) calculated from UT1 and averaged over five days. The c orrelation coefficient is R = 0.186. The preliminary conclusion is tha t the Earth's rotation could be influenced by the variation of the vel ocity of the solar wind with a short time scale of several days.