STIX workshop

Session

Session 6

23 Jul 2026, 11:00

DIAS Burlington Road

17. Activity nests as prolific flare factory: from solar minimum to maximum

Antoine Strugarek

23/07/2026, 11:00

Magnetic context, active regions, and flare productivity

Talk

Magnetic activity varies over the solar cycle and is not uniformly distributed across the Sun’s surface. Areas on the Sun with recurring flux emergence are called active region nests and show structure in
longitude. These nests are thought to form due to non-axisymmetries in the generation and storage of the Sun's dynamo magnetic field. The nesting of magnetic activity is also observed on...

9. Investigating the repeated occurrence of hard microflares in AR 13141

Andrea F. Battaglia (IRSOL)

23/07/2026, 11:30

Magnetic context, active regions, and flare productivity

Talk

In this work, we investigate the recurrent flaring activity observed by STIX from AR 13141, visible on disk in November 2022. Surprisingly, it produced more than 50 hard microflares, which are flare events rooted in a sunspot with a flat electron spectrum. Notably, all events originated from the same structure within the sunspot. In this presentation, we show the comparison between events...

12. Influence of Flare Iron Abundance Variations on GOES XRS Data Interpretation

Janusz Sylwester (Space Research Centre, Polish Academy of Sciences, Solar Physics Division)

23/07/2026, 12:00

Magnetic context, active regions, and flare productivity

Talk

Recent studies of coronal active regions and flare composition—particularly the
interpretation of STIX spectra using TEMIRA—indicate substantial variations in
iron abundance during flares. Consequently, these variations influence plasma
emissivities as observed in the two standard channels of GOES X-ray sensors
(XRS): the 0.5–4 Å (high-energy, H) and 1–8 Å (low-energy, L) bands....