## 6 Concluding Remarks  
As a result of the research presented in this article, we introduced the Schumann Resonance Complexity Index (SRCI). This is a new complexity measure designed for the measurement of algebraic complexity in magnetometers within the Global Coherence Network. This result is particularly interesting, as it fundamentally differs from all other measures of magnetic field complexity, such as the _Kp_ index and other indices that globally represent the properties of the Earth's magnetic field. On further analysis, we observed that the elimination of diel cycles from the SRCI data yields interesting results. It appears that the correlations between different magnetometers are strongly related to the meridian angles: the smaller the difference in absolute values between the meridian angles, the larger the correlation between different magnetometers. No such similarities would be noticed when analyzing the raw magnetic field signals alone. This is the second result of this article, allowing the exploration of connections between different magnetometers. This similarity immediately gives rise to a series of hypotheses. The first hypothesis suggests that if meridians play a significant role in the similarity between different magnetometers, it should be related to the influence of the Moon. However, since the magnetic field is measured locally at specific geographic locations, our intention was to evaluate the local tidal effects caused by the Moon. Fortunately, the existence of the global network of tidal waves (significantly larger than the global network of magnetometers) makes this task possible. The selection of the tidal wave monitoring station for each individual magnetometer was based on proximity. However, the geographical proximity was not the only important factor--the meridian proximity was taken into consideration because of the raised hypothesis. Note that we did not directly measure correlations between the SRCI data and the tidal wave data. In principle, the signals are entirely different: the sampling rate of the magnetic field is 130 Hz, whereas tidal waves constitute one measurement per hour. Despite this, we introduce an identical complexity measure for tidal waves: the Tidal Wave Complexity Index (TWCI). Having two indices, the Schumann Resonance Complexity Index (SRCI) and the Tidal Wave Complexity Index (TWCI), makes it possible to statistically and reliably explore possible connections. The statistical analysis yields truly intriguing results. And though the New Zealand magnetometer falls out of the rule, all the remaining magnetometers appear to be significantly correlated to the tidal effects. Thus, the main result of this article is the demonstration of the fact that the influence of the Moon (usually observed through tidal waves) affects the readings of the local magnetic field data recorded by the global network of magnetometers. Although this is the first demonstration of such an effect, in principle it is not astonishing. It is well known that tidal effects induced by the Moon affect not only water tides but also crustal displacements and the magnetosphere of the Earth. Naturally, one could expect that the same effects will also manifest in the local magnetic field. This study confirms this fact.