Fig. 3From: Extreme geomagnetic activities: a statistical studyCumulative distribution function of 1921 magnetic storms observed at KAK for time interval May 1924 to May 2020. The data points are displayed at even intervals in logarithmic scale. Log-normal and power-law fits are shown by thick and thin solid curves, respectively. The best fitted parameters are α = 4.2, μ = 1.96, and σ = 0.28Back to article page