| Summary: | 1989-11 Unusual enhancements of energetic electron fluxes (E > 30, > 100 and > 300 keV) were observed when the polar orbiting NOAA-6 satellite passed over Japan (L = 1.3) at the time of the large geomagnetic disturbance on February 8, 1986. This electron event was preceded by an intense injection in the pre-midnight sector (2040 MLT) as evidenced by the cosmic noise absorption in Syowa, Antarctica and enhancement of proton flux (0.8-4.0 MeV) detected by the geosynchronous meteorological satellite, GMS. The intensification of the sky wave strength of the LF standard signal (f=40kHz) observed on the path below the satellite orbit may be ionospheric effects of the enhancement of energetic electron flux. This special issue contains contributed papers presented at the symposium "Solar Terrestrial Events in February-March 1986" (January 19, 1989, Nagoya) departmental bulletin paper
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