THE PROBABILITY OF THE MAGNETIC FIELD RECONNECTION IN THE SOLAR WIND AND ITS OBSERVRTIONAL EVIDENCE

By comparing the intensity and anisotropy of the ion bursts (E≥125 keV/Q, Q≥1) observed simultaneously by IMP-Hand IMP-Jsatellites upstream of the bow shock in the time of January 21-22, 1976, it is shown that for four bursts a-d when IMP-His farther from the earth than IMP-J, (1) in the a and b bursts, the intensity observed by IMP-His larger than that by IMP-J, and the anisotropy measurement made by IMP-Jis flowing in a direction from the sun to the earth; (2) in the burst c, there is the same direction as the a and b bursts in the anisotropy, but the intensity observed by IMP-His smaller than that by IMP-J; (3) in the burst d, the characteristics of the intensity and anisotropy is both opposite to that in the a and b bursts. The phenomena can be interpreted satisfactorily by supposing that there are magnetic field re-connections in the solar wind which could produce energetic particles in the medium.