Open Access
Research Article

Fig. 8

image

Download original image

(Grey histograms) Average pdfs for all years of (a) 〈Ap〉τ=1day/〈Ap〉τ=1yr and (b) 〈τ=1day/〈τ=1yr . In each case the best-fit lognormal distribution is shown, with mean of unity (by definition) and a variance v = 0.934 in (a) and v =0.913 in (b). Distributions for individual years (not shown) are a bit noisier, particularly for 〈τ=1day/〈τ=1yr in years when data availability f is low, but give very similar best fit v values, as indicated by the horizontal uniformity of the bottom panels of figures (6) and (7): for the annual normalised Ap distributions, the mean ± 1 standard deviation of the fitted v values for the 53 years is 0.934 ± 0.031; for the annual normalised distributions, v values for the 31 years with f > 0.5 is 0.915 ± 0.025.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.