We present in this paper some preliminary studies on how the Earth’s ULF—Ultra Low Frequency magnetic micropulsations might interact with the human brain’s activities. Magnetic micropulsations are magnetospheric plasma wave eigenmodes that are generated at the Earth’s magnetosphere and, via magnetospheric-ionospheric coupling, induce ionospheric currents, and this ionospheric current pattern creates surface geomagnetic perturbations which in turn induce the Earth’s surface electrical currents easily detected by ground based magnetometers. These wave modes are basically of Alfvén type, and can be generated or enhanced, for instance, by magnetic storms, situation where they are more intense and, in principle, may be felt by a more magnetic sensitive human brain. Here, we also show how the modes are generated and present their basic physical properties. Finally, we compare the magnetic field level at the brain with the micro pulsation magnetic intensity.
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