Fig. 4

Superposed epoch analysis. Aa activity cycles 11–24 (1868–2015): a composite of 40 days for all cycles; b composite of 40 days of the ascending phase for all cycles; c composite of 40 days of the descending phase for all cycles; d composite of 40 days for Type 1 cycles; e composite of 40 days of the ascending phase of Type 1 cycles; f composite of 40 days of the descending phase of Type 1 cycles; g composite of 40 days for Type 2 cycles; h composite of 40 days of the ascending phase of Type 2 cycles; and i composite of 40 days of the descending phase of Type 2 cycles. The black circles represent the new Moon on the 15th day of the 40-day period. The white circles represent the full Moon on the 30th day of the 40-day period. The horizontal dashed lines correspond to one standard deviation taking the 40-day period; the values for each panel are: a 0.32, b 0.25, c 0.24, d 0.20, e 0.14, f 0.13, g 0.22, h 0.18, and i 0.12