Solar type III burst activity and the 11 year cycle

✍ Scribed by H. Daene

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 369 KB
• Volume: 289
• Category: Article
• ISSN: 0004-6337
• DOI: 10.1002/asna.19662890604

✦ Synopsis

With 3 figures. (Received 196G October IS) I t is shown from measurements of type I11 bursts a t 234 MHz, I I I MHz and 23 MHz during the foregoing solar cycle that the type I11 activity has a relative minimum in 1959 and apparently a second maximum in 1960. This is in accordance with the statement of GNEVYSHEV relating a t first to the intensity of the green coronal line. He also pointed out that the second maximum is closely correlated to some terrestrial features. I t can be stated from a comparison of the three observing frequencies that the lowest frequency corresponding to the highest coronal level shows the strongest enhancement of type I11 activity during the second part of the solar cycle. By an indirect method it can be concluded that the percentage of polarized bursts at low levels is well correlated with the WOLF number. The suggestion is discussed that type I11 activity is not only an attendant effect of solar activity but i t is also connected more directly with terrestrial features by contribution to the solar wind.