STUDY OF HIGH SOLAR ACTIVITY IN FEBRUARY 1986 Ⅳ. A PRELIMINARY ANALYSIS OF THE RELATIONSHIP BETWEEN SOLAR AND TERRESTRIAL EVENTS

Using observational data in optical, radio, soft and hard X-ray bands, the similarity and differences between the two top intense solar bursts of the solar activity sequence in early February 1986 are analysed, and the differences between the effects caused by these solar activities are interpreted. A relation identification of these solar-terrestrial events shows that a synthetic method for the event identification would be usable and a model study of solar corona with inhomogeneous structures and of interplanetary medium with inhomogeneous statures would be very necessary for a further investigation of coupling of solar-terrestrial disturbance events.