Author: Paul Wright and Iain Hannah at the University of Glasgow.
Solar flares are observed to occur over many orders of magnitude, with smaller flares occurring considerably more often than large flares.… continue to the full article
Author: Valentina Zharkova, Malcolm Druett and Eamon Scullion at the University of Northumbria.
Observations of solar flare onsets show a rapid increase of hard and soft X-rays, ultra-violet emission with large Doppler blue-shifts associated with plasma upflows, and Hα emission with red-shifts up to 1–4 Å [1, 2, 3].… continue to the full article
Author: Mathew Owens at the University of Reading.
Coronal mass ejections (CMEs) are huge, episodic eruptions of solar plasma and magnetic field which travel through the solar corona and out into the heliosphere.… continue to the full article
Author: Peter Zelina and Silvia Dalla (University of Central Lancashire).
Violent eruptions at the Sun, solar flares and coronal mass ejections, occur with frequency correlated with the 11-year solar cycle. They are sometimes accompanied by energetic particles up to GeV energies observed in situ in the interplanetary medium, by particle instruments onboard spacecraft.… continue to the full article
Author: Nathalia Alzate and Huw Morgan at Aberystwyth University, Shadia R. Habbal at the Institute for Astronomy (U of Hawai’i), Miloslav Druckmüller at Brno University of Technology and Constantinos Emmanouilidis at K@stro Observatory.
Ground based white light images taken during total solar eclipses have many unique advantages, particularly their very high dynamic range spanning tens of solar radii starting from the solar surface.… continue to the full article
Note: All work was completed at and for the Met Office, UK.
Space weather forecasting has developed rapidly in recent years, with the threat of a severe space weather event increasing in importance as society becomes ever more dependent on technology.… continue to the full article
Author: Paulo Simões, Lyndsay Fletcher, Hugh Hudson (University of Glasgow), Graham Kerr (NASA GSFC), Guigue Giménez de Castro (Centro de Rádio Astronomia e Astrofísica Mackenzie), Matt Penn (NSO)
During a solar flare, rare infrared (IR) continuum observations show strong brightenings in the chromosphere, co-spatial and co-temporal with flare hard X-ray footpoints .… continue to the full article
Author: Magnus Woods, Louise Harra, Sarah Matthews, Sally Dacie, David Long (Mullard Space Science Laboratory) and Duncan Mackay (University of St. Andrews)
The large releases of energy in the solar atmosphere known as solar flares are a clear indicator of the highly dynamic magnetic nature of the Sun’s atmosphere.… continue to the full article
Author: Mykola Gordovskyy, Philippa Browning (University of Manchester) and Eduard Kontar (University of Glasgow)
Coronal lines in solar flares often demonstrate non-thermal broadening (NTB), i.e. broadening on top of expected broadening due to the thermal motion of ions.… continue to the full article
Author: Richard Morton at Northumbria University.
The Sun’s corona has intrigued scientists since its discovery around the start of the last century. Over the years, understanding how the coronal plasma is heated to temperatures in excess of 106 Kelvin and the mechanisms which accelerate some of this plasma as it flows out into the heliosphere, forming the solar wind, have proved stubborn problems.… continue to the full article