Figure 7 - available via license: Creative Commons Attribution 4.0 International
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Matlab plot for the 10.7 cm solar radio wave. The Morlet wavelet function was applied to the data. The 27-day periodicity appeared during the solar maximum time and one excess point around day (125 ± 45) can be recognized at 3900 days from October 1970. The time corresponds to the dominant 154-day periodicity observation by GRS on broad SMM and H-alpha observation of solar surface.
Source publication
Muons produced by cosmic rays above the atmosphere provide valuable information on the intensity of cosmic rays and variations in the upper atmosphere. Since 1970, the Nagoya University Cosmic Ray Laboratory has been observing the muon intensity using a multi-directional cosmic ray telescope with two layers of 36 plastic scintillators of 1m2 each,...
Contexts in source publication
Context 1
... analysis was conducted from 14 October 1970 to April 30 April 2018. The basic data are shown in Figure 6 [21], while Figure 7 shows the results of the wavelet analysis. Figure 7 shows the existence of a strong (125 ± 45)-day cycle around 3900 days on the abscissa; the 3900th day corresponds to around 15 June 1981, which indicates that 1979-1981 was the most active period of the 21st solar cycle. ...
Context 2
... basic data are shown in Figure 6 [21], while Figure 7 shows the results of the wavelet analysis. Figure 7 shows the existence of a strong (125 ± 45)-day cycle around 3900 days on the abscissa; the 3900th day corresponds to around 15 June 1981, which indicates that 1979-1981 was the most active period of the 21st solar cycle. Matlab plot for the 10.7 cm solar radio wave. ...
