摘要: A brief description is given of the coronal index of solar activity (CI) derivedfrom ground-based observations of the green coronal line 530.3 nm (Fe XIV) and its computation. The final data of CI are presented in graphical form o... 展开 A brief description is given of the coronal index of solar activity (CI) derivedfrom ground-based observations of the green coronal line 530.3 nm (Fe XIV) and its computation. The final data of CI are presented in graphical form over the period 1988-199%. The maximum of CI coincided with the Wolf number in cycle 22, and no second maximum, sometimes seen two years after the first one, was observed in this cycle. 收起