Afterwards, the technical standard SBM, Standard of Building Biology 2015, by the Baubiologie Institute of Germany IBN [ 14 ] is adopted and interpreted as a guide for the risk prevention of exposure to geomagnetic field variability expressed in nanoteslas (nT), distinguishing four degrees of possible effects on human beings: Non-significant values 0–100 Weakly significant 100–200 Strongly significant 200–1000 Extremely significant +1000 nT For the analysed dosimetry, we set values close to 1 μT (1000 nT), since it requires immediate and rigorous action based on the precautionary principle.
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