Development is based on the analysis of changes in the magnetic field of the Earth. Tectonic processes such as displacement of layers or friction of races create weak electric currents. In contrast, they produce magnetic signals on the main area of the planet.
These signals are extremely weak, so experts analyze their statistics for a long time, not individual fluctuations. The method was checked on earthquake data on the Fukushima coast in March 2022, which caused destructive tsunami. A few days before the event, the devices recorded characteristic changes.
Source: Ferra
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