Histogram of integrated power in four frequency bands scale size for Swarm-C over nearly ten years. a) Histogram of integrated power for irregularities with scales in the 30–450 km range in the log-log scale. The red circles indicate the number of LNC instances per bin for individual events. The black line represents synthetic data with a normal distribution. Panels (b–d) for integrated power are similar to panel (a) for fluctuations having scale sizes of 15–30 km, 10–15 km, and 7.5–10 km, respectively.