Figure 10.

(a) The normalized time series excerpt of the Z component of the magnetic field recorded at DIO station of ENIGMA that plays the role of the order parameter $\varphi$. The inset shows the corresponding part of the original time series recorded on 7 June 2017. (b) The histogram of values of $\varphi$, from which the start of laminar regions ${\varphi }_o=0.965$ is determined, while the studied range of ends of laminar regions ${\varphi }_l$ is also shown. (c) The distribution of the waiting times within the laminar region (laminar lengths) ${\varphi }_o\left(=0.965\right)<\varphi <{\varphi }_l\left(=0.986\right)$ (the specific laminar region is also marked on the analyzed time series by the corresponding horizontal lines shown in (a)). The continuous red line corresponds to the fitted function $f(l)=p_1\cdot l^{-p_2}\cdot e^{-l{p}_3}$. A clear power-law is identified. (d) The exponents $p_2,p_3$ vs. the end point ${\varphi }_l$. The validity of criticality condition $p_2>1,p_3\approx 0$ for a wide range of end point values, and consequently for a wide range of laminar regions, is evident. (For interpretation of the references to colors, the reader is referred to the online version of this paper).