Space Weather

Dec 4, 2024 | aanda.org | Rui Wang |Space Weather |Ying Liu

Home All issues Volume 692 (December 2024) A&A, 692 (2024) A112 Full HTML Issue A&A Volume 692, December 2024 Article Number A112 Number of page(s) 7 Section The Sun and the Heliosphere DOI https://doi.org/10.1051/0004-6361/202452008 Published online 03 December 2024 A&A 692, A112 (2024) Unveiling key factors in solar eruptions leading to the solar superstorm in 2024 May 1,2,3⋆, 1,2,3, 4,5 and 1,2 1 State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of...

Jul 14, 2024 | newsfounded.com | Space Weather

Updated on Jul 15, 2024, 08:07 ISTThe Sun recently emitted a powerful X-class solar flare. Will it cause a geomagnetic storm on Earth? Find out what the experts say. Sunspot AR3738 Explodes, Causing Shortwave Radio Blackouts and Promising More Solar ActivityAfter a week of peace, the Sun is again spewing out the horror of solar flaress. On July 14th, sunspot AR3738 exploded producing an X1.2-class solar flare at 2:35 UT (8:05 am IST), spaceweather.com reported.

Jul 10, 2024 | academic.oup.com | Space Weather

The heliospheric current sheet (HCS) is the boundary enclosing the Sun which separates interplanetary magnetic field (IMF) of opposite polarities. As the outward extension of the solar magnetic equator, the HCS is the key structure that sculpts the heliosphere (Smith 2001). Many solar wind parameters, including speed, density, and temperature, are organized with respect to the HCS (Fletcher et al. 2015), and the propagation of cosmic ray is significantly influenced by the HCS (Potgieter 2013).

Feb 23, 2024 | academic.oup.com | Space Weather

One of the most widely observed phenomena in the solar atmosphere are the wave dynamics associated with the 3 min periodicity in sunspot atmospheres, observed over a wide range of wavelengths and atmospheric heights (Orrall 1966; Liu 1974; Khomenko & Collados 2015; Sych 2016; Jess et al. 2023). They are relatively weak in the photosphere, but are strongly enhanced in the chromosphere (Lites 1986; Tziotziou, Tsiropoula & Mein 2002; Kobanov, Kolobov & Chupin 2008; Kobanov et al. 2011; Houston et al.

Feb 20, 2024 | academic.oup.com | Space Weather

The magnetic fields in solar corona are line-tied at the solar surface (namely the photosphere), and are often highly stressed as driven by continuous slow motions at the photosphere, for example, the large-scale shearing, rotational, and converging motions associated with magnetic flux emergence, and also the small-scale supergranular and granular convections.