RUSSIAN JOURNAL OF EARTH SCIENCES, VOL. 19, ES1005, doi:10.2205/2019ES000650, 2019
Figure 3. Yearly mean sunspot number (black) up to 1749 and monthly 13-month smoothed sunspot number (blue) in 1749–2017, http://www.sidc.be/silso/yearlyssnplot. The maxima of the primary solar cycles rise and fall in somewhat cyclical manner known as the secondary solar cycles.
Citation: Kovalyov Mikhail (2019), On the correlation of seismic activity to syzygies., Russ. J. Earth Sci., 19, ES1005, doi:10.2205/2019ES000650.
Copyright 2019 by the Geophysical Center RAS.
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