Active Region AR4366

The active region AR4366 first emerged from the northeastern limb on January 30, 2026 and had since grown rapidly into a large and complex sunspot group containing more than 20 sunspots. It had also produced six X-class and dozens other M-class anc C-class solar flares throughout its journey across the surface of the Sun, including an X8.1 flare which is the strongest flare of the year 2026 so far, and the third strongest of the current solar cycle 25.

APM-TMB 228/2050 Telescope
Lunt Solar Wedge
Baader ND filter OD 3.0
Baader Solar Continuum filter 540nm
GSO 2x Barlow
QHY5III678M Camera

1000 frames stacked with AutoStakkkert!4
Wavelet sharpening with RegiStax 6
Enhancement and false color with Photoshop 2020