MODELING OF A SERIES OF INTERPLANETARY DISTURBANCE EVENTS IN SEPTEMBER 1978

A series of three interplanetary disturbance events in September 1978 are modeled. Flares responsible for the three shock waves are tentatively identified. It is shown that the computed interplanetary scintillation (IPS) sky maps for flares on 21 and 23 September clearly show that the 21 September flare was responsible for the IPS event and the geomagnetic storms which were observed on 24-25 September, although it has been generally believed that a flare on 23 September was their origin. Thus, this is a good example to show the usefulness of IPS observations to identify the responsible solar event and predict the arrival of the shock wave. It is also shown that the IPS event was not caused by a high speed stream from a coronal hole. © 1990.