October 14, 2026. At the Scientific Seminar of the GC RAS, Leading Research Scientist of the Laboratory of Mathematical Geophysics of the Geophysical Center RAS, PhD Roman Sidorov presented a report on the topic "System Analysis of Extreme Events in the Dynamics of the Electromagnetic Field of the Earth and Near-Earth Space" (based on materials from his doctoral dissertation).

In the study of the Earth's magnetic field, there exist various problems of both a fundamental nature and those related to technological processes. In the study of rapid variations of the internal field, the main problems are their insufficient study and the difficulty of their identification; in the study of disturbances of the external magnetic field, the main problems are the difficulty of comprehensive analysis of geomagnetic activity on a unified scale, the early diagnosis of magnetic storms, the identification of sudden commencements, and the study of substorm activity in the geomagnetic support of directional drilling. Both groups of tasks also involve the problem of prompt processing of large volumes of source data.

The report summarized contributions to solving the noted problems and highlighted results obtained using the MAGNUS hardware-software complex, designed for the collection, storage, and intelligent analysis of magnetic observatory data. The effectiveness of the approach implemented in MAGNUS is confirmed by the possibility of separating the signals of the internal and external electromagnetic fields and promptly detecting rapid variations of the Earth's main magnetic field. Using the MAGNUS toolkit, a signal of the secular acceleration of the Earth's main magnetic field was obtained for the 90-year period of observatory observations. As a result of its study, 5–6-year and 7–8-year periodicities of secular acceleration bursts at the mantle-core boundary were established. These results experimentally confirm the existence of several theoretical wave processes in the Earth's liquid core that underlie the rapid variations of the Earth's main magnetic field. Using new indicators of geomagnetic activity included in MAGNUS, a multi-criteria morphological analysis of geomagnetic disturbances of the external electromagnetic field and their high-precision accounting, required in magnetic field navigation tasks, was carried out. An approach to the comprehensive analysis of magnetic storms has been developed, based on the joint processing of heterogeneous data from space and ground-based monitoring.