Solar terminator related variations in geomagnetic field
Andreyev A. Somsikov V. Kapytin V. Chsherbulova Y.
June 2025Elsevier Ltd
Journal of Atmospheric and Solar-Terrestrial Physics
2025#271
The solar terminator is a global, regular source of disturbances in various parameters of the Earths atmosphere. The main feature of the solar terminator is its stability and precise regularity. To estimate the regular effects from the solar terminator in geomagnetic data, an analysis of averaged variations in the geomagnetic field components was performed based on long magnetic field time-series over the past 24 years from a large number of geomagnetic observatories. It was demonstrated that in addition to quasi-semidiurnal oscillations, Sq variations of the geomagnetic field contain relatively weak regular oscillations with periods of less than an hour, precisely tied to the moment of sunrise and sunset (passage of the solar terminator), as well as the passage of the terminator through the magnetically conjugate point.
Geomagnetic field , Geomagnetic observatories , Magnetic conjugate point , Solar terminator
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Institute of Ionosphere, Almaty, Kazakhstan
Al-Farabi Kazakh National University, Almaty, Kazakhstan
Institute of Ionosphere
Al-Farabi Kazakh National University
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026