Results 61 to 70 of about 3,282 (199)

Solar Flares Triggered by a Filament Peeling Process Revealed by High-resolution GST Hα Observations

The Astrophysical Journal Letters
The dynamic structures of solar filaments prior to solar flares provide important physical clues about the onset of solar eruptions. Observations of those structures under subarcsecond resolution with high cadence are rare.
Mia Mancuso, Ju Jing, Haimin Wang, Wenda Cao   +3 more
doaj   +1 more source

Onset of a Large Ejective Solar Eruption from a Typical Coronal-Jet-Base Field Configuration

, 2017
Utilizing multiwavelength observations and magnetic field data from SDO/AIA, SDO/HMI, GOES and RHESSI, we investigate a large-scale ejective solar eruption of 2014 December 18 from active region NOAA 12241.
Joshi, Navin Chandra, Magara, Tetsuya, Moon, Young-Jae, Moore, Ronald L., Sterling, Alphonse C.   +4 more
core   +1 more source

ERUPTION OF A SOLAR FILAMENT CONSISTING OF TWO THREADS

The Astrophysical Journal, 2012
The trigger and driving mechanism for the eruption of a filament consisting of two dark threads was studied with unprecedented high cadence and resolution of He II 304 angstrom observations made by the Atmospheric Imagining Assembly (AIA) on board the Solar Dynamics Observatory (SDO) and the observations made by the Solar Magnetic Activity Research ...
Yi Bi, Yunchun Jiang, Haidong Li, Junchao Hong, Ruisheng Zheng   +4 more
openaire   +1 more source

LARGE SOLAR ENERGETIC PARTICLE EVENTS ASSOCIATED WITH FILAMENT ERUPTIONS OUTSIDE ACTIVE REGIONS [PDF]

The Astrophysical Journal, 2015
40 pages, 10 figures, 5 tables, Accepted for publication in the Astrophysical Journal, March 31 ...
N. Gopalswamy, P. Mäkelä, S. Akiyama, S. Yashiro, H. Xie, N. Thakur, S. W. Kahler   +6 more
openaire   +2 more sources

The Composition and Stratospheric Fate of Aerosol Particles Originating in the Polar Vortex

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 20, 28 October 2025.
Abstract Stratospheric aerosol plays a significant role in the Earth's energy balance, primarily through its direct interaction with solar radiation. It is also an important chemical reactor that contributes to the multiphase chemistry of ozone destruction by halogen compounds.
Michael J. Lawler, Gregory P. Schill, Daniel M. Murphy, Maya Abou‐Ghanem, Charles A. Brock, Ming Lyu, Adam T. Ahern, Samuel J. Taylor, Eric J. Hintsa, Fred L. Moore, Geoffrey S. Dutton, J. David Nance, Bradley D. Hall, R. Bradley Pierce, Eric A. Ray, Troy D. Thornberry   +15 more
wiley   +1 more source

Multiwavelength observations of a partially eruptive filament on 2011 September 8

, 2015
In this paper, we report our multiwavelength observations of a partial filament eruption event in NOAA active region 11283 on 2011 September 8. A magnetic null point and the corresponding spine and separatrix surface are found in the active region ...
Cheng, X., Feng, L., Guo, Y., Ji, H. S., Ning, Z. J., Wiegelmann, T., Zhang, Q. M., Zhou, T. H.   +7 more
core   +1 more source

Geoeffectivity of Solar Wind Heavy Ions

Journal of Geophysical Research: Space Physics, Volume 130, Issue 10, October 2025.
Abstract The influence of solar wind properties, such as the southward interplanetary magnetic field, on geomagnetic activity has been well established. However, the role of heavy ions (i.e., particles heavier than protons) in the solar wind on geomagnetic storms is not fully understood.
Chris Jia, Susan T. Lepri, Liang Zhao, Jim M. Raines, Daniel Welling, Jennifer A. Carter, Simona Nitti   +6 more
wiley   +1 more source

Small-scale motions in solar filaments as the precursors of eruptions [PDF]

Publications of the Astronomical Society of Japan, 2019
Abstract Filaments, the dense cooler plasma floating in the solar corona supported by magnetic fields, generally exhibit certain activations before they erupt. In our previous study (Seki et al. 2017, ApJ, 843, L24), we observed that the standard deviation of the line-of-sight (LOS) velocities of the small-scale motions in a filament ...
Seki, Daikichi, Otsuji, Kenichi, Isobe, Hiroaki, Ishii, Takako T., Ichimoto, Kiyoshi, Shibata, Kazunari   +5 more
openaire   +2 more sources

Triggering an eruptive flare by emerging flux in a solar active-region complex

, 2015
A flare and fast coronal mass ejection originated between solar active regions NOAA 11514 and 11515 on July 1, 2012 in response to flux emergence in front of the leading sunspot of the trailing region 11515.
A.A. Ballegooijen van, A.C. Sterling, A.S. Savcheva, B. Kliem, B.C. Low, B.J. Lynch, B.W. Lites, C.J. Schrijver, D.H. Mackay, D.H. Mackay, D.M. Rust, G. Aulanier, G. Aulanier, G. Roumeliotis, H. Li, H. Wang, J. Feynman, J. Lin, J. Lin, J. Schou, J. Wang, J. Zhang, J.E. Leake, J.R. Lemen, J.T. Karpen, J.W. Harvey, J.W. Harvey, K. Kusano, L.M. Green, M.-J. Martres, M.J. Hagyard, O. Burtseva, P. Démoulin, P.F. Chen, P.W. Schuck, R.A. Howard, R.E. Louis, S.E. Gibson, S.F. Martin, S.F. Martin, S.H.B. Livi, T. Amari, T. Amari, T. Amari, T. Kaneko, T. Sakajiri, T. Török, T.G. Forbes, V. Archontis, V. Archontis, V. Archontis, V.S. Titov, W. Manchester IV, W. Tend van, W.D. Pesnell, X. Sun, X. Zhao, X.-Y. Xu, X.-Y. Xu, Y.-M. Wang, Z. Mikic   +60 more
core   +1 more source

Optimization of the FRi3D CME Model in EUHFORIA

Space Weather, Volume 23, Issue 9, September 2025.
Abstract To study the evolution and propagation of Coronal Mass Ejections (CMEs), the advanced magnetized flux rope CME model, Flux Rope in 3D (FRi3D), has been integrated into the European Heliospheric Forecasting Information Asset (EUHFORIA). Recent updates have been addressing the computational efficiency and numerical stability issues of this CME ...
M. Flossie, A. Maharana, L. Linan, K. Plets, A. Isavnin, S. Poedts   +5 more
wiley   +1 more source