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High-accuracy polarization measurements of the white-light corona during the 2023 total solar eclipse
Hanaoka, Yoichiro; Sakai, Yoshiaki; Masuda, Yukio
This study measured the polarization of the white-light corona during the total solar eclipse on 20 April 2023, which occurred under high solar activity. The same instrument that was used for the 2017 and 2019 eclipse observations was employed, and despite the short duration of totality, the obtained data could be used for high-accuracy polarizati…
Evidence of Kelvin-Helmholtz and tearing mode instabilities at the magnetopause during space weather events
Jerse, Giovanna; Marcucci, Maria Federica; Laurenza, Monica +9 more
Introduction: Kelvin-Helmholtz (KH) and tearing mode (TM) instabilities are one of the most important mechanisms of solar wind energy, momentum and plasma transport within the magnetosphere.Methods: To investigate the conditions under which KHTM instabilities occur in the Earth environment it is fundamental to combine simultaneous multipoint in si…
Statistical geoeffectiveness of solar-interplanetary disturbance events of type II radio bursts and CMEs/shocks
Yan, Jingye; Yu, Quanyingqi
Understanding and predicting the geoeffectiveness of solar activity on Earth is crucial for space weather. Therefore, predicting the impact of coronal mass ejections (CMEs) and their associated interplanetary (IP) shocks on Earth is essential. Observations of CMEs near the Sun can be used for these prediction and to study their propagation and evo…