The Statistical Analysis of the Millisecond Fine-Structure Events of Solar Metric Waves

The relations among the metric wave spike events, optical activities and related events recorded with the acousto-optical spectrograph during the 22nd solar cycle are statistically analysed in this article.From some characteristics observed, such as the short lifttime, narrow frequency band, fast frequency drift, quasi-periodic pulsation, spike event and complex magnetic structure, it is considered that the radiation mechanism of these events may be principally due to the electromag netic waves magnified directly by the instable electronic cyclot ron.