massive sunspot 4294-4296 on solar disk in the Ca-K line

Admittedly I had not viewed our nearest star in the Cal-K spectrum line for a while. But massive sunspot 4294-4296 complex has piqued my interest.
Calcium K (Ca-K) telescopes and filters are used to study the wavelength of 393.4 nm. This emission line is one of two that are produced by Calcium just at the edge of the visible spectrum. Comparatively, this is in a layer that is slightly lower and cooler than the layer viewed in Hydrogen-alpha. The emission line displays areas of super granulation cells that are brightest and strongest in areas of high magnetic fields, such as sunspot activity and active regions. Having the ability to study the Calcium K and the Hydrogen-alpha line provides important insights into the structure, strength, and depth of these active regions.

Jaegers 103mm refractor, Lunt B1200 Calcium K line module, Canon 60Da camera, Losmands GM-8 mount

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