Solar-Terrestrial Physics Solar-Terrestrial Physics Солнечно-земная физика / Solnechno-Zemnaya Fizika / Solar-Terrestrial Physics 2712-9640 51392 10.12737/szf-84202203 Результаты исследований Results of current research Результаты исследований Geomagnetic indices ASY-H and SYM-H and their relation to interplanetary parameters Геомагнитные индексы ASYH и SYMH и их связь с межпланетными параметрами Макаров Георгий Афанасьевич Makarov Georgy Afanasyevich gmakarov@ikfia.sbras.ru

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 Институт космофизических исследований и аэрономии им. Ю.Г. Шафера СО РАН Якутск Россия Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy SB RAS Yakutsk Russian Federation 24 12 2022 24 12 2022 8 4 38 45 23 06 2022 20 09 2022 https://naukaru.ru/en/nauka/article/51392/view

За период времени с 1981 по 2015 г. исследуются зависимости геомагнитных индексов SYM-H и ASY-H от межпланетных параметров по их среднесуточным значениям. Исследование проводится двумя путями: первый — анализируется весь массив данных, второй — данные разбиваются на девять групп активности в соответствии со среднесуточными значениями планетарного геомагнитного индекса Ар. Выполнен корреляционный анализ индексов кольцевого тока ASY-H, SYM-H и скорости солнечного ветра, модуля и северо-южной компоненты межпланетного магнитного поля (ММП). Поиск связи индексов ASY-H и SYM-H с межпланетными параметрами оказался более успешным при рассмотрении всего массива данных, чем в случае разбивки данных по группам магнитной активности. Определены регрессионные уравнения, связывающие ASY-H и SYM-H с межпланетными параметрами. Обнаружено, что при описании связи индексов ASY-H и SYM-H с северо-южной компонентой ММП необходимо учитывать вклад модуля ММП.

The dependences of the geomagnetic indices SYM-H and ASY-H on interplanetary parameters for the period from 1981 to 2015 according to their daily averages are studied. The study is carried out in two ways: the first — the entire data array is analyzed, the second — the data are divided into 9 activity groups in accordance with the average daily values of the planetary geomagnetic index Ap. A correlation analysis of the indices with the solar wind speed, magnitude, and the north-south component of the interplanetary magnetic field (IMF) has been performed. The search for a relationship between the ASY-H and SYM-H indices and interplanetary parameters turned out to be more successful when considering the entire data array than in the case of splitting the data into groups of magnetic activity. Regression equations relating ASY-H and SYM-H to interplanetary parameters are determined. It has been found that when describing the relationship between the ASY-H and SYM-H indices and the IMF north-south component, it is necessary to take into account the contribution of the IMF modulus.

 геомагнитные индексы SYM-H и ASY-H геомагнитная активность магнитосферный кольцевой ток межпланетные параметры космическая погода geomagnetic indices SYM-H and ASY-H geomagnetic activity magnetospheric ring current interplanetary parameters space weather Работа выполнена в рамках государственного задания (номер госрегистрации № 122011700182-1) The work was financially supported by the Ministry of Science and Higher Education of the Russian Federation (Grant No. 075-GZ/Ts3569/278)

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