Solar-Terrestrial Physics Solar-Terrestrial Physics Solar-Terrestrial Physics 2500-0535 30597 10.12737/stp-53201907 Results of current research Results of current research Results of current research Studying the relationship of localization parameters of solar sources of magnetic clouds with their characteristics and substorm activity Studying the relationship of localization parameters of solar sources of magnetic clouds with their characteristics and substorm activity Бархатов Николай Александрович Barhatov Nikolay Aleksandrovich nbarkhatov@inbox.ru

доктор физико-математических наук;

doctor of physical and mathematical sciences;

 Ревунова Елена Алексеевна Revunova Elena Alekseevna revunova.elena@mail.ru Романов Роман Владимирович Romanov Roman Vladimirovich r-o-m-e-n@yandex.ru Бархатова Оксана Михайловна Barhatova Oksana Mihaylovna o.barkhatova@inbox.ru

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 Ревунов Сергей Евгеньевич Revunov Sergey Evgenyevich revunov@inbox.ru

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 Нижегородский государственный педагогический университет им. К. Минина Нижний Новгород Россия Minin Nizhny Novgorod State Pedagogical University Nizhny Novgorod Russian Federation Нижегородский государственный архитектурно-строительный университет Нижний Новгород Россия Nizhny Novgorod State University of Architecture and Civil Engineering Nizhny Novgorod Russian Federation Нижегородский государственный педагогический университет имени Козьмы Минина Minin Nizhny Novgorod State Pedagogical University Нижегородский государственный архитектурно-строительный университет Нижний Новгород Россия Nizhny Novgorod State University of Architecture and Civil Engineering Nizhny Novgorod Russian Federation Нижегородский государственный педагогический университет им. К. Минина Нижний Новгород Россия Minin Nizhny Novgorod State Pedagogical University Nizhny Novgorod Russian Federation 5 3 59 67 https://zh-szf.ru/en/nauka/article/30597/view

We propose a method for determining location and orientation of extended solar sources of magnetic clouds, using coronagraph data and SOHO EIT/MDI images of the photosphere. To estimate the probability of formation of magnetic clouds, we use a simple cylindrical force-free model. We have established that more extended sources and those having a slight inclination to the solar equator and located on the solar limb as compared to those that are nonextended and strongly inclined can generate expanding clouds, which with high probability can reach the magnetosphere like clouds from a source near the zero meridian and low latitudes. We determine the relationship between extreme values of substorm activity and parameters of solar sources under study during the impact of magnetic clouds on Earth’s magnetosphere from the AL index. We note that there are no substorms associated with extended sources outside the heliolatitude range ~5–20°. The established relationship between solar source coordinates and geomagnetic activity of the magnetic cloud sheath and body are consistent with the most probable distribution of magnetoactive regions over the solar disk.

We propose a method for determining location and orientation of extended solar sources of magnetic clouds, using coronagraph data and SOHO EIT/MDI images of the photosphere. To estimate the probability of formation of magnetic clouds, we use a simple cylindrical force-free model. We have established that more extended sources and those having a slight inclination to the solar equator and located on the solar limb as compared to those that are nonextended and strongly inclined can generate expanding clouds, which with high probability can reach the magnetosphere like clouds from a source near the zero meridian and low latitudes. We determine the relationship between extreme values of substorm activity and parameters of solar sources under study during the impact of magnetic clouds on Earth’s magnetosphere from the AL index. We note that there are no substorms associated with extended sources outside the heliolatitude range ~5–20°. The established relationship between solar source coordinates and geomagnetic activity of the magnetic cloud sheath and body are consistent with the most probable distribution of magnetoactive regions over the solar disk.

 solar activity solar wind coronal plasma flow coronal mass ejection solar flare geomagnetic activity geomagnetic disturbances magnetosphere solar activity solar wind coronal plasma flow coronal mass ejection solar flare geomagnetic activity geomagnetic disturbances magnetosphere

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