A model example shows the negative consequences of the trend analysis for the solution of the problem of interpretation of geophysical data. As an alternative, an analytical downward continuation of the measurement data from the earth’s surface is proposed.

Ermokhin Konstantin Mikhailovich, Doctor of Engineering Sciences, Associate Professor, Leading Scientific al., Pushkov institute of terrestrial magnetism, ionosphere and radio wave propagation of the Russian Academy of Sciences St.-Petersburg Filial St. Petersburg branch of the Institute of Terrestrial Magnetism, Ionosphere and Propagation N.V. Pushkova RAS (SPbF IZMIRAN). Mendeleev Line-3, St. Petersburg, 194354, Russia. E-mail: k_m_e@list.ru.

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