Geomagnetic Conditions During UV-Microbursts Detected by PAIPS Photometer in the Auroral Zone

Klimov, P.; Kotikov, A.; Nikolaeva, V.; Shchelkanov, K.

Авторы: Klimov Pavel, Kotikov Andrey, Nikolaeva Vera, Shchelkanov Konstantin
Сборник: International Conference and School—Problems of Geocosmos
Серия: Springer Proceedings in Earth and Environmental Sciences
Год издания: 2026
Издательство: Springer Nature
Местоположение издательства: Switzerland
Первая страница: 583
Последняя страница: 594
DOI: 10.1007/978-3-031-92928-1_43
Аннотация: During 3 seasons of PAIPS (Pulsating Aurora Imaging System) photome-ters at Verkhnetulomsky observatory (VTL, CGM coordinates: 65.49 N, 110.06 E) operation a number of events which represent a series of short bright bursts in a 300– 400 nm wavelength range (UV-microbursts) was measured. It is a most transient form of auroral emission which can be caused by high energy electrons microbursts pre-cipitation. UV-microbursts series duration ranges from 10 s to \sim∼1 h. Time interval between pulses is not constant and varies in a range between 100 ms and 5 s. To clarify the origin of UV-microbursts analyses of geomagnetic conditions, including K_\mathrm{P} P-index, interplanetary magnetic field, global structure of field-aligned currents and ionospheric equivalent currents, was done. It was shown that in most cases UV-microbursts are observed during weakly disturbed geomagnetic conditions (average K_\mathrm{P} P index is 1^++ for the first observation season and 3^{-}− for the second season) at the evening sector of MLT. These events are associated with the weak geomagnetic storm recovery phase (SYM-H index about 100 nT). Based on these analyses a clas-sification of the UV-microbursts observational conditions is suggested and discussed in the manuscript.
Добавил в систему: Климов Павел Александрович

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