Autocorrelation of Solar Activity
Abstract
IN this communication we examine the autocorrelation function R of various indexes of solar activity over time-lags,τ, of 1-200 days. Four indexes of solar activity were used: the daily relative sunspot number (Zurich), and the mean daily fluxes from Nagoya at the frequencies 1,000 Mc/s, 3,750 Mc/s and 9,400 Mc/s. The data were analysed for the years 1957-58 (more than 700 days) and for the years 1960-63 (900 days), thus comparing the highly active years of the solar cycle with the less-active years. In addition, the relative sunspot numbers for the years 1947-48 and 1937-38 were analysed for comparison.
- Publication:
-
Nature
- Pub Date:
- June 1965
- DOI:
- 10.1038/2061035a0
- Bibcode:
- 1965Natur.206.1035A