Open Access
Research Article

Fig. 6

image

Download original image

Cumulative probability distribution (c.d.f, mauve line) and histogram of number of am samples in bins Δam = 1 nT wide (N, shown by the black line as N/Nmax, where Nmax is the maximum value of N) for all am data in the years 1959–2017 (inclusive). The grey bars give the eight overlapping am bands employed in this paper: 0 ≤ am < 10 nT, 10 ≤ am < 20 nT, 20 ≤ am < 40 nT, 30 ≤ am < 50 nT, 40 ≤ am < 60 nT, 50 ≤ am < 90 nT, 60 ≤ am < 110 nT, and am ≥ 70 nT which contain a numbers of samples N b of 58183, 51083, 40894, 22691, 13157, 8302, 10869, and 6060, respectively, and for which the mean am values are 5.32, 13.96, 27.50, 37.71, 47.76, 63.56, 73.90, and 109.14 nT.

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.